Question

Could someone please check this? :)
Solve x^3+64=0

(x+4)(x^2-4x+16)
x = 4 +- sqrt. of 16-4(1)(16)
all divided by 2(-4)

x = 4 +- 6i sqrt. 8 all over -8

and x= -4

Answer 1

I used the quadratic formula.

Answer 2

I used the quadratic formula. \[x = 4\pm 6i \sqrt{8} \]
all over -8