Solve x2 – 64 = 0.
1. Isolate x2x2 = 64
2. Apply the square root property of equality: x2 = +/64
3. Isolate the variable:

The value of x is -8 and 8

Step-by-step explanation:

By following the steps you had given :

1.

x² - 64 = 0

x² = 64

2.

x² = 64

x = +-√64

3.

x = +√64

= +8

x = -√64

= -8

f(x) = x^3 -2x^2 -3x

x( x^2 -2x-3)

x( x^2 +x -3x -3)

x( x(x+1) -3(x+1))

x( x-3)( x+1)

so zeroes are 0, 3,-1

its (2) option

answer: it's a

step-by-step explanation: