Question

Help...i dont know how to solve this
X^2- 64

Answer 1

Answer:

x = ±8

Step-by-step explanation:

X^2- 64

Set this equal to 0

x^2 -64 =0

Add 64 to each side

x^2-64+64 = 64+64

x^2 = 64

Take the square root on each side

x = ±sqrt(64)

x = ±8

Answer 2

Answer:

Step-by-step explanation:

a²-b²=(a+b)(a-b)

x²-64=x²-8²

=(x+8)(x-8)