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先分解因式,再计算求值.已知x+y=5,xy=6,求x(x+y)(x-y)-x(x+y)^2的值.先分解因式,再计算求值。已知x+y=5,xy=6,求x(x+y)(x-y)-x(x+y)的平方的值
题目详情
先分解因式,再计算求值.已知x+y=5,xy=6,求x(x+y)(x-y)-x(x+y)^2的值.
先分解因式,再计算求值。已知x+y=5,xy=6,求x(x+y)(x-y)-x(x+y)的平方的值
先分解因式,再计算求值。已知x+y=5,xy=6,求x(x+y)(x-y)-x(x+y)的平方的值
▼优质解答
答案和解析
x(x+y)(x-y)-x(x+y)^2=x(x+y)
=-2xy(x+y)
=-2*6*5
=-60
=-2xy(x+y)
=-2*6*5
=-60
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