(x-5)(100-7(x-7))=y
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(x-5)(100-7(x-7))=y(x-5)(100-7(x-7))=y(x-5)(100-7(x-7))=y(x-5)(100-7x+49)=y(x-5)(149-7x)=y149x-7x
(x-5)(100-7(x-7))=y
(x-5)(100-7(x-7))=y
(x-5)(100-7(x-7))=y
(x-5)(100-7x+49)=y
(x-5)(149-7x)=y
149x-7x²-745+35x=y
184x-7x²-745=y
5(x-y)³-3(x-y)²+7(x-y)-5(x-y)³+(x-y)²-5(x-y),其中,x-y=1/3.5(x-y)³-3(x-y)²+7(x-y)-5(x-y)³+(x-y)²-5(x-y),其中,x-y=1/3先化简,再求值;
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(x-y)^7除以(y-x)^5=?
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