Question

3(x+1)一(x+1)的平方怎样分解因式。谢谢！

Answer 1

3(x+1)一(x+1)² =3x+3-x²-2x-1 =-x²+x+2 =-(x²-x-2) =-(x-2)(x+1) =(2-x)(x+1)