数学因式分解(X+Y )3-(X2-Y2)(X-Y),(X+Y )3即为X+Y的三次方77+(35X-7)2=(35X+4)2还有一道是已知x2+y2-6x+2y+|z+3|+10=0,求x,y,帮我解决了这么多题,可只能采纳一个最佳,我就随便选了,没选到的抱歉了
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![数学因式分解(X+Y )3-(X2-Y2)(X-Y),(X+Y )3即为X+Y的三次方77+(35X-7)2=(35X+4)2还有一道是已知x2+y2-6x+2y+|z+3|+10=0,求x,y,帮我解决了这么多题,可只能采纳一个最佳,我就随便选了,没选到的抱歉了](/uploads/image/z/11488827-3-7.jpg?t=%E6%95%B0%E5%AD%A6%E5%9B%A0%E5%BC%8F%E5%88%86%E8%A7%A3%28X%2BY+%293-%28X2-Y2%29%28X-Y%29%2C%28X%2BY+%293%E5%8D%B3%E4%B8%BAX%2BY%E7%9A%84%E4%B8%89%E6%AC%A1%E6%96%B977%2B%2835X-7%292%3D%2835X%2B4%EF%BC%892%E8%BF%98%E6%9C%89%E4%B8%80%E9%81%93%E6%98%AF%E5%B7%B2%E7%9F%A5x2%2By2-6x%2B2y%2B%7Cz%2B3%7C%2B10%3D0%2C%E6%B1%82x%2Cy%2C%E5%B8%AE%E6%88%91%E8%A7%A3%E5%86%B3%E4%BA%86%E8%BF%99%E4%B9%88%E5%A4%9A%E9%A2%98%EF%BC%8C%E5%8F%AF%E5%8F%AA%E8%83%BD%E9%87%87%E7%BA%B3%E4%B8%80%E4%B8%AA%E6%9C%80%E4%BD%B3%EF%BC%8C%E6%88%91%E5%B0%B1%E9%9A%8F%E4%BE%BF%E9%80%89%E4%BA%86%EF%BC%8C%E6%B2%A1%E9%80%89%E5%88%B0%E7%9A%84%E6%8A%B1%E6%AD%89%E4%BA%86)
数学因式分解(X+Y )3-(X2-Y2)(X-Y),(X+Y )3即为X+Y的三次方77+(35X-7)2=(35X+4)2还有一道是已知x2+y2-6x+2y+|z+3|+10=0,求x,y,帮我解决了这么多题,可只能采纳一个最佳,我就随便选了,没选到的抱歉了
数学因式分解(X+Y )3-(X2-Y2)(X-Y),
(X+Y )3即为X+Y的三次方
77+(35X-7)2=(35X+4)2
还有一道是已知x2+y2-6x+2y+|z+3|+10=0,求x,y,
帮我解决了这么多题,可只能采纳一个最佳,我就随便选了,没选到的抱歉了
数学因式分解(X+Y )3-(X2-Y2)(X-Y),(X+Y )3即为X+Y的三次方77+(35X-7)2=(35X+4)2还有一道是已知x2+y2-6x+2y+|z+3|+10=0,求x,y,帮我解决了这么多题,可只能采纳一个最佳,我就随便选了,没选到的抱歉了
(X+Y )3=(x+y)(x2-xy+y2),(x2-y2)(x-y)=(x+y)(x-y)2=(x+y)(x2-2xy+y2),提取(x+y),其余的合并计算结果为xy,所以结果为xy(x+y).
(x+y)^3-(x+y)(x-y)^2
=x³+3x²y+3xy²+y³-(x³-x²y-xy²+y³)
=x³+3x²y+3xy²+y³-x³+x²y+xy²-y³
=4x²y+4xy²
=4xy(x+y)谢谢,再请教下两道题,一道是...
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=x³+3x²y+3xy²+y³-(x³-x²y-xy²+y³)
=x³+3x²y+3xy²+y³-x³+x²y+xy²-y³
=4x²y+4xy²
=4xy(x+y)
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=(X+Y)3-(X+Y)(X-Y)(x-Y)
=(X+Y)3-(X+Y)(X-Y)2
=(X+Y)[(X+Y)2-(X-Y)2]
=(X+Y)(X+Y+X-Y)(X+Y-X+Y)
=(X+Y)(2X)(2Y)
=4XY(X+Y)谢谢,再请教下两道题,一道是解方程,
77+(35X-7)2=(35X+4)2
还有一道是已知x2+y2-6x+2...
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=(X+Y)3-(X+Y)(X-Y)(x-Y)
=(X+Y)3-(X+Y)(X-Y)2
=(X+Y)[(X+Y)2-(X-Y)2]
=(X+Y)(X+Y+X-Y)(X+Y-X+Y)
=(X+Y)(2X)(2Y)
=4XY(X+Y)
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