问题标题:
(1)x(x+y+z)+yz(2)x²(a-1)+y²(1-a)(3)x^4-2x²+1(4)m²-8m+16(5)(xy)²+18xy+81(6)a²-24a+144(7)64x²-80xy+25y²
问题描述:
(1)x(x+y+z)+yz(2)x²(a-1)+y²(1-a)
(3)x^4-2x²+1(4)m²-8m+16
(5)(xy)²+18xy+81(6)a²-24a+144
(7)64x²-80xy+25y²
莫丰勇回答:
1)x(x+y+z)+yz=x(x+z)+y(x+z)=(x+y)(x+z)2)x2(a-1)+y2(1-a)=(a-1)(x2-y2)=(a-1)(x-y)(x+y)3)x^4-2x2+1=(x2-1)2=(x-1)(x+1)(x-1)(x+1)4)m2-8m+16=(m-4)2=(m-4)(m-4)5)(xy)2+18xy+81=(xy+9)2=(xy+9)(xy...
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