展开 c(8,4)yDI(12,-4)

解答

展开

c (8, 4) yD I (12, - 4)

12 (8 \cdot 4,) Dcy I, - 4 (8 \cdot 4,) Dcy I

求解步骤

c (8, 4) yD I (12, - 4)

= (8 \cdot 4,) (12, - 4) Dcy I

使用分配律:

a (b - c) = ab - a c

a = c (8, 4) yD I, b = 12,, c = 4

= c (8, 4) yD I \cdot 12, - c (8, 4) yD I \cdot 4

= 12 (8 \cdot 4,) Dcy I, - 4 (8 \cdot 4,) Dcy I

s im pl i f y (i w + 1)^{2}

e x p an d \frac{x ^{2} + 6 x + 9}{( x - 1 ) ( x - 2 ) ( x + 4 )}

e x p an d lo g_{3} (2.5)

e x p an d \frac{( s + 2 ) ( s + 4 )}{s ( s + 1 ) ( s + 5 ) ( s + 10 )}

e x p an d \frac{2 ( 4 w + 10 )}{3} (= - 3)