Відео

This video shows how to square a binomial and provides two different proofs of the formula. The answers to the practice problems in the video are as follows: 1) x^2 10x 25 2) x^2 - 6x 9 3) x^2 8x 16 4) x^2 16x 64 5) y^2 -4y 4 6) w^2 - 2w 1 7) l^2 4l 4 8) t^2 - 10t 25

We learn to divide one complex number by another. The answers to the practice problems in the video are as follows: 1) -7i/3 2) 1/5 4i/5 3) 7/2 3i 4) -3/4 2i 5) -1/2 3i/2 6) 36/13 15i/13 7) 11/5 - 18i/5 8) -39/25 -6i/5 9) 1/5 - 18i/5 10) -16/29 -47i/29

This video shows complex number arithmetic and defines conjugate complex numbers. The answers to the practice problems in the video are as follows: 1) 7 9i 2) 5 - 3i 3) 1 -7i 4) 8 - 8i 5) -8 4i 6) 3 - I 7) -33 56i 8) 7 3i 9) -14 31i 10) 49 - 50i

This video introduced an extended number system called complex numbers

This short video introduced the term "quadratic" to prepare for subsequent lessons on quadratic functions and quadratic equations.

This video is on a system of equations and teaches the substitution method to solve. The answers to the problems in the video are as follows: 1. (2, 1) 2. (1, 1) 3. (1, 2) 4. (1, 3) 5. (3, 4) 6. (2, -3) 7. (-2, 3) 8. (2, -1)

This video introduced system of equations and a solution strategy called Addition method. The answers to the practice problems in the video are as follows: 1. (3, 2) 2. (3, 2) 3. (5, 1) 4. (5, 4) 5. (8, 2) 6. (3, 2) 7. (4, -1) 8. (2, -1)

This video covers all absolute value inequalities and the answers to the practice problems in the video are as follows: 1) -8 less than x less than 8 2) -5 leq y leq 5 3) m greater than 2 OR m less than -2 4) m geq 4 OR m leq -2 5) l greater than 3 OR l less than -4 6) No solution 7) All real numbers 8) y leq 1 OR y geq 11/3

In this video the solution methods for greater than inequalities are discussed. The answers to the practice problems in the video are 1) y geq 7 OR y leq -7 2) y geq 7 OR y leq -7 3) y geq 6 OR y leq -6 4) z geq 5 OR z leq -5 5) m geq 3 OR m leq -2 6) t geq 3 OR t leq -3 7) u geq 8 OR u leq -2 8) -1 leq v leq 13/5

This video shows absolute value inequalities that involve only "less than" and "less than or equal to" inequalities. Answers to the practice problems in the video are 1. -3 less than x less than 3 2. -7/2 less than x less than 7/2 3. -4 less than x less than 4 4. -4 leq x leq 6 5. -1 less than x less than 7 6.-7 leq x leq 2 7. -5 leq x leq 7 8. -10/3 less than x less than 2

This video discussed the relationship between slopes of parallel lines and also the relationship between the slopes of perpendicular lines. The answers to the problems in the video are 1) 3 2) y = -2x 3 3) 0 4) y = x 8 5) -5/2 6) y = 1/2x 4 7) Undefined 8) y =-x 2

The standard form of a straight line is introduced and the answers to the practice problems in the video are as follows: 1) X-int = 6, Y-int = 4 2) X-int = 5, Y-int = -15/4 3) X-int = 4, Y-int= none 4) X-int = none, Y-int = 7 5) slope = -2/3 6) slope = 3/4

This video introduces a way to write an equation of a line when a point on it and it's slope are given. The answers to the practice problems in the video are as follows: 1) y - 5 = 1(x 2) 2) y 3 = -2(x - 0) 3) y - 4 = 0(x - 5) 4) y 1 = 5/7(x 3) 5) y = x 7 6) y = -2x - 3 7) y = 4 8) y = 5/7x 8/7

This is a video about slope-intercept form. The answers to the practice problems in the video are as follows: 1). y = 2x - 3 2). y = 4x 3). y = x 4 4). Slope: 3, y-intercept: -5 5). Slope: 1, y-intercept: 7 6). Slope: -1, y-intercept: 2 7). Slope: 0, y-intercept: -3 8). Slope: -4, y-intercept: 0