9y^4+42y^3+49y^2
always look for a common factor first, sure enough - y^2
= y^2(9y^2 + 42y + 49)
mmmhh? squares in front and back, is it a perfect square? yup!!
= y^2(3y+7)(3y+7)
Just not good at this, factor complete, or state that the polynomial is prime.
9y^4+42y^3+49y^2
(9+y)(9-y)+42(y+3)(y-3)^2+49(y+2(y-2)
I can not seem to get it right. so help me please
1 answer