化简 3(3-sqrt(3))

解答

化简

3 (3 - 3)

9 - 33

十进制

3.80384 \dots

求解步骤

3 (3 - 3)

使用分配律:

a (b - c) = ab - a c

3 (3 - 3) = 3 \cdot 3 - 33

= 3 \cdot 3 - 33

数字相乘:

3 \cdot 3 = 9

= 9 - 33

s im pl i f y (cos (x) + cos (y))^{2} + (sin (x) + sin (y))^{2}

e x p an d sec (b) (cos (b) + sin (b))

e x p an d (- 3, 5) y (- 4, - 1)

e x p an d \frac{( 2 x + 4 )}{s ( s ^{2} + 5 )}

e x p an d sin (y) (e^{x} + e^{x} y)