分解因式：①3a-12a^2+18a^3②(x+y)^2(x-y)-(x+y)(x-y)^2③18-2x^4④-0.49b^2+25a^2

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分解因式：①3a-12a^2+18a^3②(x+y)^2(x-y)-(x+y)(x-y)^2③18-2x^4④-0.49b^2+25a^2分解因式：①3a-12a^2+18a^3②(x+y)^2(x-

分解因式：①3a-12a^2+18a^3②(x+y)^2(x-y)-(x+y)(x-y)^2③18-2x^4④-0.49b^2+25a^2
分解因式：①3a-12a^2+18a^3②(x+y)^2(x-y)-(x+y)(x-y)^2③18-2x^4④-0.49b^2+25a^2

分解因式：①3a-12a^2+18a^3②(x+y)^2(x-y)-(x+y)(x-y)^2③18-2x^4④-0.49b^2+25a^2
①3a-12a^2+18a^3
=3a(1-4a+6a^2)
②(x+y)^2(x-y)-(x+y)(x-y)^2
=(x+y)(x-y)[(x+y)-(x-y)]
=(x+y)(x-y)(x+y-x+y)
=2y(x+y)(x-y)
③18-2x^4
=2(9-x^4)
=2(3-x^2)(3+x^2)
④-0.49b^2+25a^2
=(5a-0.7b)(5a+0.7b)

①3a-12a^2+18a^3
=3a(1-4a+6a²)
②(x+y)^2(x-y)-(x+y)(x-y)^2
=(x+y)(x-y)(x+y-x+y)
=2y(x+y)(x-y)
③18-2x^4
=2(9-x^4)
=2(3+x²)(3-x²)
④-0.49b^2+25a^2
=(5a+0.7b)(5a-0.7b)

分解因式 -a^3-4a^2+12a快分解因式 a平方-3a+2 分解因式:a²+3a+2 a²-3a+2分解因式 18(a-b)^3-12b(b-a)^ 分解因式 3a的2次方-6a+12分解因式 3a^2-6a+12= (分解因式) 分解因式-8a(a+1)^2+2a^3 分解因式答对有分哦,不对就. 3a—12a的2次方+18a的3次方（分解因式, -3a³+12a²-12a 分解因式分解因式3a³-12a²+12a 分解因式:3a-6a^2+3a^3 分解因式a^3+3a^2+3a+9 (a+2)(a-2)+3a分解因式分解因式：a^4+a^2-4a-3 分解因式:a^3-a^2-5a+5 -5a^3+10a^2-5a分解因式分解因式:1-a+a^2-a^3=