展开 sqrt(10)(sqrt(3)+sqrt(11))

解答

展开

10 (3 + 11)

30 + 110

十进制

15.96531 \dots

求解步骤

10 (3 + 11)

使用分配律:

a (b + c) = ab + a c

10 (3 + 11) = 103 + 1011

= 103 + 1011

103 = 30

1011 = 110

= 30 + 110

e x p an d - \frac{2 x}{( x ^{2} + 3 ) ^{2}}

e x p an d \frac{8}{( x - 2 ) ^{2}}

s im pl i f y 32 (1 - cos (t))

e x p an d - (- 3 + sin^{2} (x))^{2} cos (x) sin (x)

e x p an d \frac{2 x + 5}{( x ^{2} + 2 ) ( x + 1 )}