#1**0 **

(a)

Because the curve C in Figure 3 crosses the x-axis at points A and B, the solutions of the equation are A and B:

y = x(x + 4)(x - 2)

0 = x(x + 4)(x - 2) ...

now solve for x -> x_{1} = 0, x_{2} = -4 and x_{3} = 2

We already know A or B are not zero,

so A = -4 (because A is negative) and B = 2 (because B is positive).

Straight Feb 23, 2022