来自崔六喜的问题
解方程x(2x-3)+3x+3x(x-2)=5x(x-4)+11
解方程x(2x-3)+3x+3x(x-2)=5x(x-4)+11
5回答
2020-05-15 01:41
解方程x(2x-3)+3x+3x(x-2)=5x(x-4)+11
解方程x(2x-3)+3x+3x(x-2)=5x(x-4)+11
x(2x-3)+3x+3x(x-2)=5x(x-4)+11
2x²-3x+3x+3x²-6x=5x²-20x+11
5x²-6x=5x²-20x+11
5x²-6x-5x²+20x=11
14x=11
x=11/14
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错了呢,应该等于1
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解方程x(2x-3)+3x(x-2)=5x(x-4)+11,的却是我错了......
x(2x-3)+3x(x-2)=5x(x-4)+112x²-3x+3x²-6x=5x²-20x+115x²-9x=5x²-20x+115x²-9x-5x²+20x=1111x=11x=1