Question

PLSSS HURRY!!!!!!!!

Solve the quadratic equation.

(x + 3)2 = 64

A) x = 5 or -11

B) x = 11 or -5

C) x = ± 3

D) x = ± 11

Answer 1

A) x=5 or -11

Explanation:

The given equation is:

`(x+3)^2=64`

The most suitable method so solve this quadratic equation is the square root method.

We take square root of both sides to obtain:

`x+3=\pm √(64)`

`\implies x+3=\pm8`

`\implies x=-3\pm8`

We now split the plus or minus sign to get;

`x=-3-8\:,x=-3+8`

This simplifies to:

`x=-11\:,x=5`

The correct choice is A