有关因式分解的7道题注:^代表xx次方1.x^4y^4-812.(2x-y)^2-(x+2y)^23.x^2-12x+364.25a^2b^2+20ab+45.1/9m^2+1-2/3m6.(a+b)^2+2(a+b)+17.16(a-b)^2+24(a-b)+9

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有关因式分解的7道题注:^代表xx次方1.x^4y^4-812.(2x-y)^2-(x+2y)^23.x^2-12x+364.25a^2b^2+20ab+45.1/9m^2+1-2/3m6.(a+b)^2+2(a+b)+17.16(a-b)^2+24(a-b)+9
有关因式分解的7道题
注:^代表xx次方
1.x^4y^4-81
2.(2x-y)^2-(x+2y)^2
3.x^2-12x+36
4.25a^2b^2+20ab+4
5.1/9m^2+1-2/3m
6.(a+b)^2+2(a+b)+1
7.16(a-b)^2+24(a-b)+9

有关因式分解的7道题注:^代表xx次方1.x^4y^4-812.(2x-y)^2-(x+2y)^23.x^2-12x+364.25a^2b^2+20ab+45.1/9m^2+1-2/3m6.(a+b)^2+2(a+b)+17.16(a-b)^2+24(a-b)+9
1.x^4y^4-81
=(x^2y^2+9)(x^2y^2-9)
=(x^2y^2+9)(xy+3)(xy-3)
2.(2x-y)^2-(x+2y)^2
=(2x-y+x+2y)(2x-y-x-2y)
=(3x+y)(x-3y)
3.x^2-12x+36
=(x-6)^2
4.25a^2b^2+20ab+4
=(5ab+2)^2
5.1/9m^2+1-2/3m
=1/9(m-3)^2
6.(a+b)^2+2(a+b)+1
=(a+b+1)^2
7.16(a-b)^2+24(a-b)+9
=[4(a-b)+3]^2
=(4a-4b+3)^2