分解因式4m^3+4m^2n-9mn^2-9n^3 ax^2=ax-bx-b -3x^2-2x^2y^2+6xy (2x^3-4)+(x^2-8x) 4x^2-y^2-4x-2y分解因式(1)4m^3+4m^2n-9mn^2-9n^3 (2) ax^2+ax-bx-b (3)x^3y-3x^2-2x^2y^2+6xy (4)(2x^3-4)+(x^2-8x) (5)4x^2-y^2-4x-2y
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![分解因式4m^3+4m^2n-9mn^2-9n^3 ax^2=ax-bx-b -3x^2-2x^2y^2+6xy (2x^3-4)+(x^2-8x) 4x^2-y^2-4x-2y分解因式(1)4m^3+4m^2n-9mn^2-9n^3 (2) ax^2+ax-bx-b (3)x^3y-3x^2-2x^2y^2+6xy (4)(2x^3-4)+(x^2-8x) (5)4x^2-y^2-4x-2y](/uploads/image/z/5159720-56-0.jpg?t=%E5%88%86%E8%A7%A3%E5%9B%A0%E5%BC%8F4m%5E3%2B4m%5E2n-9mn%5E2-9n%5E3+ax%5E2%3Dax-bx-b+-3x%5E2-2x%5E2y%5E2%2B6xy+%282x%5E3-4%29%2B%28x%5E2-8x%29+4x%5E2-y%5E2-4x-2y%E5%88%86%E8%A7%A3%E5%9B%A0%E5%BC%8F%281%294m%5E3%2B4m%5E2n-9mn%5E2-9n%5E3+%282%29+ax%5E2%2Bax-bx-b+%283%29x%5E3y-3x%5E2-2x%5E2y%5E2%2B6xy+%284%29%282x%5E3-4%29%2B%28x%5E2-8x%29+%285%294x%5E2-y%5E2-4x-2y)
分解因式4m^3+4m^2n-9mn^2-9n^3 ax^2=ax-bx-b -3x^2-2x^2y^2+6xy (2x^3-4)+(x^2-8x) 4x^2-y^2-4x-2y分解因式(1)4m^3+4m^2n-9mn^2-9n^3 (2) ax^2+ax-bx-b (3)x^3y-3x^2-2x^2y^2+6xy (4)(2x^3-4)+(x^2-8x) (5)4x^2-y^2-4x-2y
分解因式4m^3+4m^2n-9mn^2-9n^3 ax^2=ax-bx-b -3x^2-2x^2y^2+6xy (2x^3-4)+(x^2-8x) 4x^2-y^2-4x-2y
分解因式(1)4m^3+4m^2n-9mn^2-9n^3 (2) ax^2+ax-bx-b (3)x^3y-3x^2-2x^2y^2+6xy (4)(2x^3-4)+(x^2-8x) (5)4x^2-y^2-4x-2y
分解因式4m^3+4m^2n-9mn^2-9n^3 ax^2=ax-bx-b -3x^2-2x^2y^2+6xy (2x^3-4)+(x^2-8x) 4x^2-y^2-4x-2y分解因式(1)4m^3+4m^2n-9mn^2-9n^3 (2) ax^2+ax-bx-b (3)x^3y-3x^2-2x^2y^2+6xy (4)(2x^3-4)+(x^2-8x) (5)4x^2-y^2-4x-2y
(1)4m^3+4m^2n-9mn^2-9n^3 =4m^2(m+n)-9n^2(m+n)=(4m^2-9n^2)(m+n)
=(2m-3n)(2m+3m)(m+n)
(2) ax^2+ax-bx-b= ax^2-bx+ax-b=x(ax-b)+(ax-b)=(x+1)(ax-b)
(3)x^3y-3x^2-2x^2y^2+6xy =x^2(xy-3)-2xy(xy-3)=(x^2-2xy)(xy-3)
(4)(2x^3-4)+(x^2-8x)=2x^3+x^2-8x-4=x^2(2x+1)-4x(2x+1)=(x^2-4x)(2x+1)=x(x-4)(2x+1)
(5)4x^2-y^2-4x-2y=(2x-y)(2x+y)-2(2x+y)=(2x-y-2)(2x+y)