展开 6(x-(2x+3)=8-5x)

解答

展开

6 (x - (2 x + 3) = 8 - 5 x)

- 6 x - 18 = 8 - 30 x

求解步骤

6 (x - (2 x + 3) = 8 - 5 x)

= 6 (x - 8 = (2 x + 3) - 5 x)

打开括号

= 6 x + 6 (- (2 x + 3) = 8) + 6 (- 5 x)

使用加减运算法则

+ (- a) = - a

6 x - 6 (2 x + 3) = 8 - 6 \cdot 5 x

化简

6 x - 6 (2 x + 3) = 8 - 6 \cdot 5 x : - 6 x - 18 = 8 - 30 x

- 6 x - 18 = 8 - 30 x

e x p an d (x + 7) ((x + Δ x) + 7)

e x p an d \frac{( - 5 x + 55 ) ( 11 - x )}{2}

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

e x p an d (3 + 2 i) \cdot [6 + 3 i, 0 + 0 i, 5 + 1 i, 4]

e x p an d lo g_{8} (27)