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Question
solve (3x - 2)(x - 4) = 0
Step1: 应用零乘积性质
若两个数的乘积为\(0\),则至少其中一个数为\(0\)。所以对于\((3x - 2)(x - 4)=0\),有\(3x - 2 = 0\)或\(x - 4 = 0\)。
Step2: 解\(3x - 2 = 0\)
方程两边同时加\(2\):\(3x - 2 + 2 = 0 + 2\),即\(3x = 2\);
两边同时除以\(3\):\(x=\frac{2}{3}\)。
Step3: 解\(x - 4 = 0\)
方程两边同时加\(4\):\(x - 4 + 4 = 0 + 4\),得\(x = 4\)。
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\(x=\frac{2}{3}\)或\(x = 4\)