展开 sqrt(5)(9+sqrt(2))

解答

展开

5 (9 + 2)

95 + 10

十进制

23.28688 \dots

求解步骤

5 (9 + 2)

使用分配律:

a (b + c) = ab + a c

5 (9 + 2) = 5 \cdot 9 + 52

= 5 \cdot 9 + 52

5 \cdot 9 + 52 = 95 + 10

= 95 + 10

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