1.(b²+2a²)(2a²-b²) 2.(4x²-4y²)
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题目内容:
1.(b²+2a²)(2a²-b²) 2.(4x²-4y²)(x²+y²)
3.—(x-1)(x+1)-3(x+2)(x-2) 4.(5y²+4x²)[4y²+(2x-y)(-2x-y)]
优质解答
1.(b²+2a²)(2a²-b²)=1.(2a²+b²)(2-b²)=4a四次方-b四次方2.(4x²-4y²)(x²+y²)=4 (x²-y²)(x²+y²)=4(X四次方-y四次方)=4X...
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