4x²Y-(6X³+6XY²-2X²Y)+(2Y²X+6X³
来源:学生作业帮 编辑:作业帮 分类:数学作业 时间:2024/05/27 12:22:46
4x²Y-(6X³+6XY²-2X²Y)+(2Y²X+6X³+6)(X²-Y²)-(2X²-3Y)
错了!是4x²Y-(6X³+6XY²-2X²Y)+(2Y²X+6X³+6)和(X²-Y²)-(2X²-3Y)
错了!是4x²Y-(6X³+6XY²-2X²Y)+(2Y²X+6X³+6)和(X²-Y²)-(2X²-3Y)
4x²Y-(6X³+6XY²-2X²Y)+(2Y²X+6X³+6)
=4x²Y-6X³-6XY²+2X²Y+2Y²X+6X³+6
=6X²Y-4XY²+6
(X²-Y²)-(2X²-3Y)
=X²-Y²-2X²+3Y
=-X²-Y²-3Y
再问: 第2题我题目打错了 是(X²-Y²)-4(2X²-3Y)
再答: =X²-Y²-8X²+12Y =-7X²-Y²+12Y
=4x²Y-6X³-6XY²+2X²Y+2Y²X+6X³+6
=6X²Y-4XY²+6
(X²-Y²)-(2X²-3Y)
=X²-Y²-2X²+3Y
=-X²-Y²-3Y
再问: 第2题我题目打错了 是(X²-Y²)-4(2X²-3Y)
再答: =X²-Y²-8X²+12Y =-7X²-Y²+12Y
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