121（x-y）²-169（x+y）²答案是-4（12x+y）（x+12y）但我要的是详细的过程.十分钟内搞定!

121（x-y）²-169（x+y）²答案是-4（12x+y）（x+12y）但我要的是详细的过程.十分钟内搞定!
121（x-y）²-169（x+y）²
答案是-4（12x+y）（x+12y）
但我要的是详细的过程.
十分钟内搞定!

121（x-y）²-169（x+y）²答案是-4（12x+y）（x+12y）但我要的是详细的过程.十分钟内搞定!
121（x-y）²-169（x+y）²
=[11(x-y)]^2-[13(x+y）]^2
=[11(x-y)+13(x+y)][11(x-y)-13(x+y)]
=(24x+2y)(-2x-24y)
=-4(y+12x)(x+12y)

121(x²-2xy+y²)-169(x²+2xy+y²)
=-48x²-580xy-48y²
=-4(12x²+145xy+12y²)
=-4(12x+y)(x+12y)

121（x-y）²-169（x+y）²
=-4（12x+y）（x+12y）

原式=[11（x-y）]^2-[13(x+y)]^2
=(11x-11y)^2-(13x+13y)^2
=(11x-11y+13x+13y)(11x-11y-13x-13y)
=(24x+2y)(-2x-24y)
=-4(12x+y)(x+12y)

121（x-y)²-169（x+y)²
=[11(x-y)]²-[13(x+y）]²
=[11(x-y)+13(x+y)][11(x-y)-13(x+y)]
=(24x+2y)(-2x-24y)
=-4(y+12x)(x+12y)
二十分就是超高？

=(11(x-y)-13(x+y))*(11(x-y)+13(x+y))
=(-2x-24y)*(24x+2y)
=-2*(x+12y)*2*(12x+y)
=-4*(12x+y)*(x+12y)

121（x-y）²-169（x+y）²
原式=11²（x-y）²-13²（x+y）²
=[11(x-y)+13(x+y)]＊[11(x-y)-13(x+y)]
=(11x-11y+13x+13y) ＊(11x-11y-13x-13y)
=(24x+2y) (-2x-24y)
=2＊(12x+y) ＊(-2)(x+12y)
=-4(12x+y)(x+12y)

121*（X-Y)*(X-Y)-169*(X+Y)*(X+Y)
=11*11*(X-Y)(X-Y)-13*13*(X+Y)*(X+Y)
=(11X-11Y)2-(13X+13Y)2
=(11X-11Y+13X+13Y)(11X-11Y-13X-13Y)
=(24X+2Y)(-2X-24Y)
=(2)*(12X+Y)*(-2)*(X+12Y)
=-4(12X+Y)(X+12Y)