Question

9x^2+4

Answer 1

(3 x-2 i) (3 x+2 i)

Answer 2

that makes the 4 negative . ill try switching signs

Answer 3

Try using wolfram alpha.

Type whatever then type (factor) and it does it for you

Answer 4

if you wanna know how he did that...it's
9x^2 + 4 = 0
9x^2 = -4
sqrt both sides...
3x = sqrt(-4) which is sqrt (4i^2) -> +\- 2i
3x = +/- 2i...so...
3x - 2i and 3x + 2i are factors

Answer 5

I think he just wolfram alpha