3x^2 + 3x+7x+73x(x+1)+7(x+1) (x+1)(3x+7)

请输入您的数学问题…… 3x^2 + 3x+7x+73x(x+1)+7(x+1) (x+1)(3x+7)

问题

3 x^{2} + 3 x + 7 x + 73 x (x + 1) + 7 (x + 1) (x + 1) (3 x + 7)

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