Descompuneti in factori ireductibili:

a)10x³+20x²-15x la puterea 4=

b)x²-81=

c)a(x+y)+bx+by=

d)36x²+24x+4=

e)x²+7x+12=

f)(2x+1)²-(3-4x)²=


Am nevoie rapida de el !!!
help me...