展开-(-2x^2-6x+5=0)

解答

展开

- (- 2 x^{2} - 6 x + 5 = 0)

2 x^{2} + 6 x - 5 = 0

求解步骤

- (- 2 x^{2} - 6 x + 5 = 0)

= - (- 2 x^{2} - 6 x + 5 \cdot 0 =)

打开括号

= - (- 2 x^{2}) - (- 6 x) - (5 = 0)

使用加减运算法则

- (- a) = a, - (a) = - a

2 x^{2} + 6 x - 5 = 0

e x p an d \frac{- 2 u - ( 2 v + 1 ) j}{- v - 2 + u j}

e x p an d \frac{x + 3}{( x + 4 ) ^{2}}

e x p an d 4 (x + d x)^{3}

e x p an d (x y^{2} + x) d x + (y x^{2} + y) d y

e x p an d A (- 2, 1) B (5, - 7)