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受欢迎的代数 >

2c^2+14c+10=-3

解答

2 c^{2} + 14 c + 10 = - 3

解答

c = \frac{- 7 + 23}{2}, c = - \frac{7 + 23}{2}

+1

十进制

c = - 1.10208 \dots, c = - 5.89791 \dots

求解步骤

2 c^{2} + 14 c + 10 = - 3

将

3

para o lado esquerdo

2 c^{2} + 14 c + 13 = 0

使用求根公式求解

c_{1, 2} = \frac{- 14 \pm 1 4 ^{2} - 4 \cdot 2 \cdot 13}{2 \cdot 2}

1 4^{2} - 4 \cdot 2 \cdot 13 = 223

c_{1, 2} = \frac{- 14 \pm 2 23}{2 \cdot 2}

将解分隔开

c_{1} = \frac{- 14 + 2 23}{2 \cdot 2}, c_{2} = \frac{- 14 - 2 23}{2 \cdot 2}

c = \frac{- 14 + 2 23}{2 \cdot 2} : \frac{- 7 + 23}{2}

c = \frac{- 14 - 2 23}{2 \cdot 2} : - \frac{7 + 23}{2}

二次方程组的解是:

c = \frac{- 7 + 23}{2}, c = - \frac{7 + 23}{2}

作图

流行的例子

因式分解 2x^2-6=11

f a c t or 2 x^{2} - 6 = 11

2 x + 3 = x^{2} + x + 1

(x + 20)^{2} = 625

x^2-(2x+1)^2=-21

x^{2} - (2 x + 1)^{2} = - 21

0=-0.04x^2+0.8x+9

0 = - 0.04 x^{2} + 0.8 x + 9