Thank you for the comment, and for subsribing. I have just started uploading videos again - aiming for one a week, each Sunday. So coming this Sunday is Simultaneous Equations. All the best with your studies.
Thanks for the comment. Yes good point, the expansion can be shown in many ways and the order you show of ac then ad then cb and finally bd is the one I'm using but just shown in a different way. And good to point out that it works for all binomials. I was using it specifically for quadratics which is most likely to appear in the UK GCSE.
Yes good points, thanks for the comment.. It is easy for me sometimes to forget other ways of doing this stuff and just teach one method. I think because, when we are learning one method helps, just to get the feel of it. l like your first point as it emphaises that we are dealing with factors. :-)
There is a good saying worth learning when squaring a bracket like this. It is. Square the first term, square the second term, then twice the product of the two. So square x. then square (-10)=+100. Then the product is -10x so twice the product is -20x. so the answer is x(squared) - 20x + 100. I do apologise for the very slow reply.
think of the bracket bit as being -1 times the bracket then when expanding times everything in the bracket by -1. So 5a-3b+2c-1(2a+b+3c)=5a-3b+2c-2a-b-3c then collect like terms together to give 5a-2a-3b-b+2c-3c which ends up being 3a-4b-c Hope that makes sense
The best way i found was a standard formula that works for all which. (a+b)(c+d). This can be any equation.the formula i use for all the question is ac+(ad+cb)+ bd. It works for question like (x-2)(x+1) and (2x+12)(x-9). To make sure u understand what i am talking about for example (x-3)(x+9) a=1 b=-3 c= d=9
2 times 3 then 2 times -x then -x times 3 and finally -x times -x. This will give 6 -2x -3x +xsquared Then collecting the like terms we finally have 6 -5x + xsquared. I do apologise for the very slow reply.
Hello Amina, a year of study ahead of you - wishing you all the best. A good tip with maths is if you get stuck, no need to struggle with it. Just look up the topic on youtube, then practice. Just practice little and often. Hope your studies go well.
learned this quicker here then i did in math class...
Yeah, my teacher didn't make it clear enough either, thanks man
Premium Foodsnacks same
Thankyou very much this helped massively with my homework!! Will be coming back to this channel again!! 👊👌☺
Thank you for the comment, and for subsribing. I have just started uploading videos again - aiming for one a week, each Sunday. So coming this Sunday is Simultaneous Equations. All the best with your studies.
Thanks for the comment. Yes good point, the expansion can be shown in many ways and the order you show of ac then ad then cb and finally bd is the one I'm using but just shown in a different way. And good to point out that it works for all binomials. I was using it specifically for quadratics which is most likely to appear in the UK GCSE.
This is really helpful thanks! It really helped bring back what I had to do for these questions, considering i've forgotten.
Great, glad it helped - good to have a reminder now and then.
This vid just gained you a new subscriber, keep them coming! :-D
This video was really helpful! :) Thank you!
Glad to hear it helped. All the best :-)
Great, glad it was helpful.
Yes good points, thanks for the comment.. It is easy for me sometimes to forget other ways of doing this stuff and just teach one method. I think because, when we are learning one method helps, just to get the feel of it. l like your first point as it emphaises that we are dealing with factors. :-)
Remember FOIL (First, Outer, Inner, Last) to expand the brackets in the first part of the video. This always made it easier for me.
what would (x-10) squared be?
+Jazzy W Thats why I came here too
haha lol
There is a good saying worth learning when squaring a bracket like this. It is. Square the first term, square the second term, then twice the product of the two. So square x. then square (-10)=+100. Then the product is -10x so twice the product is -20x. so the answer is x(squared) - 20x + 100. I do apologise for the very slow reply.
Thanks! Really helped
think of the bracket bit as being -1 times the bracket then when expanding times everything in the bracket by -1.
So 5a-3b+2c-1(2a+b+3c)=5a-3b+2c-2a-b-3c then collect like terms together to give
5a-2a-3b-b+2c-3c which ends up being 3a-4b-c Hope that makes sense
this is alot of help
Love ya darl thanks for the help
Sounds like fun, be great if the students could use it in an exam.
The best way i found was a standard formula that works for all which. (a+b)(c+d). This can be any equation.the formula i use for all the question is ac+(ad+cb)+ bd. It works for question like (x-2)(x+1) and (2x+12)(x-9). To make sure u understand what i am talking about for example (x-3)(x+9) a=1 b=-3 c= d=9
how would you solve (2-x)(3-x) ?
2 times 3 then 2 times -x then -x times 3 and finally -x times -x. This will give 6 -2x -3x +xsquared Then collecting the like terms we finally have 6 -5x + xsquared. I do apologise for the very slow reply.
Great, glad it was useful. :-)
I made a program for this on java (netbeans IDE)
is A FOIL method right ?
Yes FOIL is fine to use. It is just a different order than I use here. But the answers are the same. I do apologise for the very slow reply.
Same here :D
I’m doing my GCSEs in 2021 and I’m so scared😭
Hello Amina, a year of study ahead of you - wishing you all the best. A good tip with maths is if you get stuck, no need to struggle with it. Just look up the topic on youtube, then practice. Just practice little and often. Hope your studies go well.