展开 9\sqrt[3]{t}(8-t)

解答

展开

9 3 t (8 - t)

72 3 t - 9 t 3 t

求解步骤

9 3 t (8 - t)

使用分配律:

a (b - c) = ab - a c

9 3 t (8 - t) = 9 3 t \cdot 8 - 9 3 t t

= 9 3 t \cdot 8 - 9 3 t t

化简

9 3 t \cdot 8 - 9 3 t t : 72 3 t - 9 t 3 t

= 72 3 t - 9 t 3 t

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e x p an d (x^{\frac{1}{2}} + y^{\frac{1}{3}})^{3}

e x p an d (2 sin (x) + 1)^{2}

e x p an d \frac{( 7 s - 31 )}{( ( s + 3 ) ( s + 4 ) )}

e x p an d \frac{2 + 1}{( 2 - 1 ) ^{5}}