Question

1. Factor x2 + 64. Check your work.

Answer 1

@ranga

Answer 2

@Adriennne

Answer 3

please help?!

Answer 4

a^2 + b^2 = (a + ib) * (a - ib) where i is square root of -1.
x^2 + 64 = x^2 + 8^2
Apply the formula in line 1 to line 2.

Answer 5

I know it has something to do with complex numbers.... ok, so (x+8i)(x-8i)??

Answer 6

is that right?

Answer 7

Yes.

Answer 8

Ok!!! Thank you soo much !!!!

Answer 9

You are welcome.

Answer 10

:)

Answer 11

They say to check your work.
So multiply (x+8i)(x-8i) using the FOIL method and verify the answer is indeed x^2 + 64.