Question

What are the x-intercepts of the graph below of the function below y=x^2+2x-15

Answer 1

Answer:

Option A - (-5,0) and (3,0).

Step-by-step explanation:

Given : Function $y=x^2+2x-15$

To find : What are the x-intercepts of the function ?

Solution :

The x-intercept means when y became zero i.e. y=0,

$x^2+2x-15=0$

Solve the quadratic equation by middle term split,

$x^2+5x-3x-15=0$

$x(x+5)-3(x+5)=0$

$(x+5)(x-3)=0$

$x+5=0,x-3=0$

$x=-5,x=3$

The x-intercepts are (-5,0) and (3,0).

Therefore, Option A is correct.

Answer 2

Answer is A............