已知x-2y=4,求5(x-2y)²-x+2y-60的值
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已知x-2y=4,求5(x-2y)²-x+2y-60的值
已知x-2y=4,求5(x-2y)²-x+2y-60的值
已知x-2y=4,求5(x-2y)²-x+2y-60的值
5(x-2y)²-x+2y-60
=5*4²-4-60
=5*16-64
=16
5(x-2y)²-x+2y-60
=5(x-2y)²-(x-2y)-60
=5*4²-4-60
=16
=5x4^2-4-60=16
答案是24 24不是x的值