Question

Which is a solution to the equation? (x −2)(x + 5) = 18 x = −10 x = −7 x = −4 x = −2

Answer 1

B

Explanation:

Answer 2

Solutions:

`x=-7`

`x=4`

Explanation:

`(x-2)(x + 5) = 18`

Expanding the factored form:

`x^2+5x-2x-10=18`

`x^2+3x-28=0`

Factoring the second-degree polynomial:

`(x+7)(x-4)=0`

This is true for

`x=-7 \text{ or } x=4`