Question

1. If f(x) = 8 – 10x and g(x) = 5x + 4, what is the value of (fg)(–2)?

Answer 1

1. f(x) = 8 - 10xg(x) = 5x + 4
(fg)(x) = (8 - 10x)(5x + 4)(fg)(x) = 40x + 32 - 50x^2 - 40x(fg)(x) = 32 - 50x^2
(fg)(-2) = 32 - 50(-2)^2(fg)(-2) = 32 - 200(fg)(-2) = -168
2. Signs are inverted. Since, Q4 = (x , -y)Therefore Q? = (-x , y), which belongs to Quadrant 2.
b) It includes points in Quadrant II
3. f(x) = 3x^2 + 1g(x) = 1 - x
(f - g)(x) = 3x^2 + 1 - (1 - x)(f - g)(x) = 3x^2 + 1 - 1 + x(f - g)(x) = 3x^2 + x(f - g)(2) = 3(2)^2 + 2(f - g)(2) = 14

Answer 2

Answer:

The Correct answer is -168

Step-by-step explanation: