Question 324828
36x^4-8x^3-28x^2=0
4x^2(9x^2-2x-7)=0
4x^2(9x+7)(x-1)=0
4x^2=0
x=0 ans.
8x+7=0
9x=-7
x=-7/9 ans.
x-1=0
x=1 ans.