当2y-x=5时,5(x-2y)²-3(-x+2y)-100的值是________.
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当2y-x=5时,5(x-2y)²-3(-x+2y)-100的值是________.
当2y-x=5时,5(x-2y)²-3(-x+2y)-100的值是________.
当2y-x=5时,5(x-2y)²-3(-x+2y)-100的值是________.
5[-(2y-x)]²-3(2y-x)-100
5x25-3x5-100=125-15-100=10