【(X+2Y)²-(X-2Y)²-(X+2Y)(X-2Y)-4y²】除以2X,其中X=负2.Y=12详细过程,急急急
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【(X+2Y)²-(X-2Y)²-(X+2Y)(X-2Y)-4y²】除以2X,其中X=负2.Y=12详细过程,急急急【(X+2Y)²-(X-2Y)²-
【(X+2Y)²-(X-2Y)²-(X+2Y)(X-2Y)-4y²】除以2X,其中X=负2.Y=12详细过程,急急急
【(X+2Y)²-(X-2Y)²-(X+2Y)(X-2Y)-4y²】除以2X,其中X=负2.Y=12
详细过程,急急急
【(X+2Y)²-(X-2Y)²-(X+2Y)(X-2Y)-4y²】除以2X,其中X=负2.Y=12详细过程,急急急
[(x+2y)^2-(x-2y)^2-(x+2y)(x-2y)-4y^2]/2x
=((x+2y+x-2y)(x+2y-x+2y)-x^2+4y^2-4y^2)/2x
=(8xy-x^2)/2x
=4y-x/2;
=4×12-(-2)/2
=48+1
=49
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