已知:x²-6x+8y+y²+25=0 求、2x+3y的值,
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已知:x²-6x+8y+y²+25=0 求、2x+3y的值,
已知:x²-6x+8y+y²+25=0 求、2x+3y的值,
已知:x²-6x+8y+y²+25=0 求、2x+3y的值,
x=3,y=-4