(x-2y)的2次方+(x+2y)(x-2y)+(x+2y)的2次方
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(x-2y)的2次方+(x+2y)(x-2y)+(x+2y)的2次方(x-2y)的2次方+(x+2y)(x-2y)+(x+2y)的2次方(x-2y)的2次方+(x+2y)(x-2y)+(x+2y)的2
(x-2y)的2次方+(x+2y)(x-2y)+(x+2y)的2次方
(x-2y)的2次方+(x+2y)(x-2y)+(x+2y)的2次方
(x-2y)的2次方+(x+2y)(x-2y)+(x+2y)的2次方
原式=(x²-4xy+4y²)+(x²-4y²)+(x²+4xy+4y²)
=x²-4xy+4y²+x²-4y²+x²+4xy+4y²
=3x²+4y²
(y-x)²(x-y)+(x-y)的三次方+2(x-y)²(y-x)
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x-y+x+y分之2y的2次方
y=x的-2次方(x
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(x-y)的四次方(x-y)-2(x-y)²(y-x)³等于?
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(x+3y)(x-3y)(x的2次方-9y的2次方)
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(x—y)的2次方×(x—y)的5次方×(y-x)=()
(x-y)的3次方乘(x-y)的2次方乘(y-x)
(x-y)的2次方×(y-x)的3次方×(x-y)=
x(x-y)-y(y-x)+(x-y)的二次方其中x=-1y=2
(x+y)的2次方(x-y)的2次方-(x-y)(x+y)(x的2次方+y的2次方)
25x的二次方-10x(x-y)+(x-y)的2次方