Algebraic Fractions - Adding and Subtracting GCSE IGCSE
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- Опубліковано 5 вер 2014
- How to add and subtract algebraic examples, from simple cases to harder examples invovling quadratic terms and adding three fractions together.
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many thanks it took me a while to get my head around LCM of some of those algebraic terms but got there in the end.
Excellent, pleased to hear it!
6:55 your denominator in the final answer was (x+3) (x+2). If i multiply tht out and leave it as x^2+x+6 will i get the marks
Yes, strictly speaking (x+3)(x+2) is simpler, but you wouldn't lose marks for multiplying it out. Keeping it factorised is better though, as if the numerator factorises as well and has a factor in common you would need to cancel them and you could lose marks if you didn't spot that. But in this example either is fine
Hi, is this the correct answer to the question you didnt complete? 3x^2+24x+35 / x^3+12x^2+35x+24
+Yousef Tanas Yes, you are correct, although I probably wouldn't multiply out the denominator as generally things which are factorised are considered simpler. But still it makes for good practice at multiplying out brackets!
9:15 how would you get 2x and can you explain it please
I've multiplied top and bottom of the fraction by x, so the 2 in the question becomes 2x. This was to make the denominators of the two fractions the same so that they could be combined.
ohh yes now i get it thank you so much
10:00 1000% confused