展开 sqrt(3)(sqrt(2)+sqrt(7))

解答

展开

3 (2 + 7)

6 + 21

十进制

7.03206 \dots

求解步骤

3 (2 + 7)

使用分配律:

a (b + c) = ab + a c

3 (2 + 7) = 32 + 37

= 32 + 37

32 = 6

37 = 21

= 6 + 21

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