展开 sqrt(t)(t^2+3t+2)

解答

展开

t (t^{2} + 3 t + 2)

t^{2} t + 3 t t + 2 t

求解步骤

t (t^{2} + 3 t + 2)

使用分配律:

m (a + b + c) = ma + mb + m c

t (t^{2} + 3 t + 2) = t t^{2} + t \cdot 3 t + t \cdot 2

= t t^{2} + t \cdot 3 t + t \cdot 2

= t^{2} t + 3 t t + 2 t

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