Question 简化表达式 4x+y 求值 12x−12y3x2−3y2将表达式因式分解 12x−12y(3x−3y)(x+y)将表达式因式分解 4(3x−3y)(3x−3y)(x+y)Solution 4x+y Show Solution 查找排除的值 x=y 求值 12x−12y3x2−3y2要查找排除值，请将分母设置为 0 12x−12y=0将表达式因式分解 12(x−y)=0简化 x−y=0将表达式移到右侧 x=0+ySolution x=y Show Solution
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