初二下册数学课本北师大版第49页习题2.2第1题,把下列各式分解因式.

问题描述:

初二下册数学课本北师大版第49页习题2.2第1题,把下列各式分解因式.
一共8道题,每题都要有解题过程.
1.2X^2-4X 2.8m^2n+2mn 3.a^2X^2y-axy^2 4.3X^3-3X^2-9X 5.-24x^2y-12xy^2+28y^3 6.-4a^3b^3"+6a^2b-2ab
7.-2x^2-12xy^2+8xy^3 8.-3ma^3+6ma^2-12ma 9.15ax-20ay 10.-16x^4-32x^3+56x^2 一共10题.

1.2X^2-4X =2X(X-2)2.8m^2n+2mn =2mn(4m+1)3.a^2x^2y-axy^2 =axy(ax-y)4.3X^3-3X^2-9X =3X(X^2-X-3)5.-24x^2y-12xy^2+28y^3 =4y(7y^2-3xy-6x^2)6.-4a^3b^3"+6a^2b-2ab=-2ab( 2a^2b^2-3a+1)7.-2x^2-12xy^2+8xy^...