Question

factor 16x^2+49. check your work

Answer 1

a^2 + b^2 = (a + bi)(a - bi) where i is square root of -1.

Answer 2

do I use that for x^2 + 64 too?

Answer 3

Not sure what you are referring to ^^^.

16x^2 + 49 = (4x)^2 + (7)^2 = (4x + 7i)(4x - 7i)

Answer 4

Oh, yes. The same formula for a different problem.

Answer 5

okay, thank you! I know what you're talking about :)

Answer 6

You are welcome.