化简 8(2sqrt(5)-2)

解答

化简

8 (25 - 2)

165 - 16

十进制

19.77708 \dots

求解步骤

8 (25 - 2)

使用分配律:

a (b - c) = ab - a c

8 (25 - 2) = 8 \cdot 25 - 8 \cdot 2

= 8 \cdot 25 - 8 \cdot 2

8 \cdot 25 - 8 \cdot 2 = 165 - 16

= 165 - 16

e x p an d t sin (t) (cos (t) - t sin (t))

\frac{d}{d t} ((s) (3 t^{2} - sec (t) + 3))

s im pl i f y (75 + \frac{c}{2}) (450 - 3 c) - c (450 - 3 c)

e x p an d - 711 (7 + 33)

e x p an d \frac{1}{( x - a ) ( x - b ) ( x - c )}