My first question is f(x)=9x^4-27

*must factor out completly (don't forget to include complex roots)

---- i don'yt know where to start. i can't use the quadratic---since it is raised to the 4th how would i factor out? would it be

9x^4+27x^2-27-27 but then i have a x^2 in my equation.

my second question is

Solve 3x^2+7x=-45

---- if i use the quatric in this equation i get a decimal under my root. So i'm stuck after i equal it to zero.

3x^2+7x+45=0

i'm having trouble factoring this out. i need 2 numbers that when mult equal 45 and when added/subtracted equal 7? but both of my signs need to be (+) positive?

Help please