Question

determine the y - intercept of the following equation.
(-x - 4)(x + 5)=y
answer
(0, - 20)
(0,20)
(4,0) and (-5,0)
(0, - 4) and (0, - 5)
(-20,0)
(-4,0) and (-5,0)

Explanation:

Step1: Recall y - intercept concept

The y - intercept occurs when $x = 0$.

Step2: Substitute $x = 0$ into equation

Substitute $x=0$ into $y=(-x - 4)(x + 5)$. Then $y=(-0 - 4)(0 + 5)$.

Step3: Simplify the expression

$y=(-4)\times5=-20$. So the y - intercept is the point $(0,-20)$.

Answer:

A. $(0, - 20)$