Question

Factor: (x^2-4)(x^2+4)

Answer 1

hint: \(x^2 - 4\) is difference of two squares

the formula for difference of two squares is \[\huge a^2 - b^2 \implies (a+b)(a-b)\]
does that help? or do you need more help?

Answer 2

so would it be: (x-2)(x+2)???

Answer 3

that's just for one x^2 - 4

remember: you have TWO

Answer 4

Yeah i am lost now hah

Answer 5

here's a hint: \[x^2 + 4 = (x-2i)(x+2i)\]
does that help?

Answer 6

nope you lost me, whats the i for?

Answer 7

it's an imaginary number

Answer 8

don't you have that?

Answer 9

if you haven't discussed it yet, you can just express it as \[(x+2)(x-2)(x^2 + 4)\]

Answer 10

Nope havent gottent that hah, but thanks for the help! Appreciate it!

Answer 11

welcome