展开 9(x=3)^7+5(x+3)4+2(x+3)

解答

展开

9 (x = 3)^{7} + 5 (x + 3) 4 + 2 (x + 3)

9 (x = 3)^{7} + 20 x + 60 + 2 x + 6

求解步骤

9 (x = 3)^{7} + 5 (x + 3) \cdot 4 + 2 (x + 3)

= 9 (3 = x)^{7} + 5 \cdot 4 (x + 3) + 2 (x + 3)

乘开

5 \cdot 4 (x + 3) : 20 x + 60

= 9 (x = 3)^{7} + 20 x + 60 + 2 (x + 3)

乘开

2 (x + 3) : 2 x + 6

= 9 (x = 3)^{7} + 20 x + 60 + 2 x + 6

e x p an d 2 (e^{5} - e^{2})

e x p an d 18 π (\frac{π}{12} - \frac{1}{4})

e x p an d h (x) in v ers a (9 - 2 x)

e x p an d \frac{( 2 x ( 200 - 4 x ) )}{3}

e x p an d 7 e (5 e - 7) + 2 (9 e^{2} - 8)