1. idk
write 3x as a difference
x^2+4x-x-4>0
then factor out x from the expression
X x (x+4)-x-4>0
factor the negative sign
X x (x+4)- (x+4)>0
( x+4)x (x-1)>0
aneswer: (-∞ , -4) ( 1, + ∞)
