展开 2f^2(2e+f)

解答

展开

2 f^{2} (2 e + f)

2 f^{3} + 4 e f^{2}

求解步骤

2 f^{2} (2 e + f)

使用分配律:

a (b + c) = ab + a c

a = 2 f^{2}, b = 2 e, c = f

= 2 f^{2} \cdot 2 e + 2 f^{2} f

= 2 \cdot 2 e f^{2} + 2 f^{2} f

化简

2 \cdot 2 e f^{2} + 2 f^{2} f : 2 f^{3} + 4 e f^{2}

= 2 f^{3} + 4 e f^{2}

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