展开 3sqrt(5)(2*sqrt(2)-sqrt(7))

解答

展开

3 \cdot 5 \cdot (2 \cdot 2 - 7)

610 - 335

十进制

1.22542 \dots

求解步骤

35 (22 - 7)

使用分配律:

a (b - c) = ab - a c

35 (22 - 7) = 35 \cdot 22 - 357

= 35 \cdot 22 - 357

35 \cdot 22 - 357 = 610 - 335

= 610 - 335

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