Question

Factor 16x2 + 49

Answer 1

okay, so I just want somebody to check me... I think the answer is (4x + 7i)(4x - 7i) Is this correct?

Answer 2

@ranga
@mathmale
@TuringTest
@Rose96<3
and/or anybody else who is willing to help
I will fan/ medal AND give a fan testimonial

Answer 3

PLEASE HELP?!?!!?!?!?!?

Answer 4

It's a difference of two squares the general formula is
x^2 - y^2 = (x+y)(x-y)
so in your specific case,
(4x+7)(4x-7)

Answer 5

but, you would get 16x^2 - 49... or am i wrong?

Answer 6

(4x + 7i)(4x - 7i) is correct

When you have a sum of squares a^2 + b^2, you can factor it to get (a+bi)(a-bi)

Answer 7

YAY!!!! thank you sooo much!!!

Answer 8

:)

Answer 9

thanks for the medals you guys.