Question

2y²-17y-30 5x²-3x-2 分解因式 4xy-4x²y-y³

2y²-17y-30 5x²-3x-2 分解因式 4xy-4x²y-y³

Answer 1

2y²-17y-30

=(2y+3)(y-10)  

   5x²-3x-2

=(5x+2)(x-1)  

4xy-4x²y-y³

=y(4x-4x²-y²)

=-y(2x-y)²;