解方程组 (x+2)² -(y-3)²=(x+y)(x-y) x-3y=2
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解方程组 (x+2)² -(y-3)²=(x+y)(x-y) x-3y=2
解方程组 (x+2)² -(y-3)²=(x+y)(x-y) x-3y=2
解方程组 (x+2)² -(y-3)²=(x+y)(x-y) x-3y=2
(x+2)² -(y-3)²=(x+y)(x-y)
整理得
x^2+4x+4-y^2+6y-9=x^2-y^2
即4x+6y-5=0 (1)
x-3y=2 (2)
(2)×2+(1)得
6x=9
x=3/2,y=-1/6