展开 ,(270+90sqrt(5))cm^3

解答

展开

(270 + 905) c m^{3}

90 c m^{3} (3 + 5)

求解步骤

(270 + 905) c m^{3}

= c m^{3} (270 + 905)

使用分配律:

a (b + c) = ab + a c

c m^{3} (270 + 905) = c m^{3} \cdot 270 + c m^{3} \cdot 905

= c m^{3} \cdot 270 + c m^{3} \cdot 905

化简

c m^{3} \cdot 270 + c m^{3} \cdot 905 : 90 c m^{3} (3 + 5)

= 90 c m^{3} (3 + 5)

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