展开 sqrt(3)(-7-sqrt(2))

解答

展开

3 (- 7 - 2)

- 73 - 6

十进制

- 14.57384 \dots

求解步骤

3 (- 7 - 2)

使用分配律:

a (b - c) = ab - a c

3 (- 7 - 2) = 3 (- 7) - 32

= 3 (- 7) - 32

3 (- 7) - 32 = - 73 - 6

= - 73 - 6

s im pl i f y (r - 3)^{2}

e x p an d \frac{( x ^{2} + 3 x - 2 )}{( ( x ^{2} - 1 ) ( x - 2 ) )}

e x p an d (3 sin (x) - 3) (2 cos (x) + 1)

e x p an d \frac{s + 2}{( s + 3 ) ( s - 1 )}

e x p an d \frac{s ^{2}}{( s ^{2} + 4 ) ( s ^{2} - s + w ^{2} )}