Factor and solve for x
1) x^4 - 9x^2> 0
2) 4x2^x - x^3 2^x<or equal to 0
I don't know where to start on 1 but for 2 I got
X<or equal to -4 or x> or equal to 4
Could some one please explain how to do 1 and tell me if I did 2 correctly?
x>3 or x<-3
-2<=x<=0 or x>=2
How did you get those 2 answers for 2?