What are the solutions to the equation 0.8x^2+5x+3.1=0 ?

The solutions to the equation 0.8x^2+5x+3.1=0 are x=(-25+sqrt(377))/8 ,x=-(25+sqrt(377))/8

Find the zeros of 0.8x^2+5x+3.1=0

The zeros of 0.8x^2+5x+3.1=0 are x=(-25+sqrt(377))/8 ,x=-(25+sqrt(377))/8

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

Popular >

0.8 x^{2} + 5 x + 3.1 = 0

x = \frac{- 25 + 377}{8}, x = - \frac{25 + 377}{8}

Decimal Notation

x = - 0.69793 \dots, x = - 5.55206 \dots

Solution steps

0.8 x^{2} + 5 x + 3.1 = 0

Multiply both sides by

10

8 x^{2} + 50 x + 31 = 0

Solve with the quadratic formula

x_{1, 2} = \frac{- 50 \pm 5 0 ^{2} - 4 \cdot 8 \cdot 31}{2 \cdot 8}

5 0^{2} - 4 \cdot 8 \cdot 31 = 2377

x_{1, 2} = \frac{- 50 \pm 2 377}{2 \cdot 8}

Separate the solutions

x_{1} = \frac{- 50 + 2 377}{2 \cdot 8}, x_{2} = \frac{- 50 - 2 377}{2 \cdot 8}

x = \frac{- 50 + 2 377}{2 \cdot 8} : \frac{- 25 + 377}{8}

x = \frac{- 50 - 2 377}{2 \cdot 8} : - \frac{25 + 377}{8}

The solutions to the quadratic equation are:

x = \frac{- 25 + 377}{8}, x = - \frac{25 + 377}{8}

c^{2} = (5)^{2} + (6)^{2}

4 n^{2} - 15 n + 15 = 5

3 x^{2} - 8 x - 11 = 0

x (x + 3) = 10

k^{2} + k - 21 = - 3

What are the solutions to the equation 0.8x^2+5x+3.1=0 ?
The solutions to the equation 0.8x^2+5x+3.1=0 are x=(-25+sqrt(377))/8 ,x=-(25+sqrt(377))/8
Find the zeros of 0.8x^2+5x+3.1=0
The zeros of 0.8x^2+5x+3.1=0 are x=(-25+sqrt(377))/8 ,x=-(25+sqrt(377))/8