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-2ab7.-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.
2019-05-07
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.
优质解答
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^3＝2x(4y^3-6y^2-x)
8.-3ma^3+6ma^2-12ma ＝-3ma(a^2-2a+4)
9.15ax-20ay ＝5a(3x-4y)
10.-16x^4-32x^3+56x^2＝-8x^2(2x^2+4x-7)
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^3＝2x(4y^3-6y^2-x)
8.-3ma^3+6ma^2-12ma ＝-3ma(a^2-2a+4)
9.15ax-20ay ＝5a(3x-4y)
10.-16x^4-32x^3+56x^2＝-8x^2(2x^2+4x-7)