已知:x+2y=1,x-5y=-1,求6x²-18xy-60y² ---------------已知:x+2y=1,x-5y=-1,求6x²-18xy-60y² -------------------------“的值”上面的 3 2
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已知:x+2y=1,x-5y=-1,求6x²-18xy-60y² ---------------已知:x+2y=1,x-5y=-1,求6x²-18xy-60y² -------------------------“的值”上面的 3 2
已知:x+2y=1,x-5y=-1,求6x²-18xy-60y² ---------------
已知:x+2y=1,x-5y=-1,求6x²-18xy-60y² -------------------------“的值”上面的 3 2
已知:x+2y=1,x-5y=-1,求6x²-18xy-60y² ---------------已知:x+2y=1,x-5y=-1,求6x²-18xy-60y² -------------------------“的值”上面的 3 2
原式=6(x²-3xy-10y²)=6(x+2y)(x-5y).所以最后答案-6
负6
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