(x+y)^2-16(x-y)^2
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(x+y)^2-16(x-y)^2(x+y)^2-16(x-y)^2(x+y)^2-16(x-y)^2化简：-15x^2+34xy-15y^2=(5x+3y)(-3x-5y)或(-5x-3y)(3x+
(x+y)^2-16(x-y)^2
(x+y)^2-16(x-y)^2
(x+y)^2-16(x-y)^2
化简：
-15x^2+34xy-15y^2
=(5x+3y)(-3x-5y)或(-5x-3y)(3x+5y)
如果（x+y）^2-16(x-y)^2=0
化简为（5X-3Y）(3X-5Y)
=(x+y+4x-4y)(x+y-4x+4y)
=(5x-3y)((5y-3x)
x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2
化简y(x+y)+(x+y)(x-y)-x^2
(x+y)^2-16(x-y)^2
(x+y)^2-16(x-y)^2
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