把下列各式因式分解7(a-1)+x(a-1)(2)3(a-b)²+6(b-a)(3)2(m-n)²-m(m-n)(4)x(x-y)²-y(y-x)²(5)m(a²+b²)+n(a²+b²)(6)18(a-b)³-12b(b-a)²(7)
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把下列各式因式分解7(a-1)+x(a-1)(2)3(a-b)²+6(b-a)(3)2(m-n)²-m(m-n)(4)x(x-y)²-y(y-x)²(5)m(a²+b²)+n(a²+b²)(6)18(a-b)³-12b(b-a)²(7)
把下列各式因式分解7(a-1)+x(a-1)
(2)3(a-b)²+6(b-a)
(3)2(m-n)²-m(m-n)
(4)x(x-y)²-y(y-x)²
(5)m(a²+b²)+n(a²+b²)
(6)18(a-b)³-12b(b-a)²
(7)(2a+b)(2a-3b)-3a(2a+b)
(8)x(x+y)(x-y)-x(x+y)²
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把下列各式因式分解7(a-1)+x(a-1)(2)3(a-b)²+6(b-a)(3)2(m-n)²-m(m-n)(4)x(x-y)²-y(y-x)²(5)m(a²+b²)+n(a²+b²)(6)18(a-b)³-12b(b-a)²(7)
(1)7(a-1)+x(a-1)=(a-1)(x+7)
(2)3(a-b)2+6(b-a) =(a-b)(3a-3b-6)=3(a-b)(a-b-2)
(3)2(m-n)2 - m(m-n)=(m-n)(2m-2n-m)=(m-n)(m-2n)
(4)x(x-y)2 - y(y-x)2= (x-y)2(x-y)=(x-y)3
(5)m(a2+b2)+n(a2+b2)=(a2+b2)(m+n)
(6)18(a-b)三次方-12b(b-a)=6(a-b)[3(a-b)2+2b]=6(a-b)(3a2-6ab+3b2+2b)
(7)(2a+b)(2a-3b)-3a(2a+b)=(2a+b)(2a-3b-3a)=-(2a+b)(a+3b)
(8)x(x+y)(x-y)-x(x+y)2=-2xy(x+y)
7(a-1)+x(a-1)=(a-1)(7+x) 3(a-b)²+6(b-a)=3(a-b)(a-b+2) 2(m-n)²-m(m-n)=(m-n)(m-2n) x(x-y)²-y(y-x)²=(x-y)^3 m(a&...
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7(a-1)+x(a-1)=(a-1)(7+x) 3(a-b)²+6(b-a)=3(a-b)(a-b+2) 2(m-n)²-m(m-n)=(m-n)(m-2n) x(x-y)²-y(y-x)²=(x-y)^3 m(a²+b²)+n(a²+b²)=(a²+b²)(m+n) 18(a-b)³-12b(b-a)²=6(a-b)^2(3a-5b) (2a+b)(2a-3b)-3a(2a+b) = -(2a+b)(a+3b) x(x+y)(x-y)-x(x+y)²=-2xy(x+y)
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