What are the solutions to the equation 5x^2+4=-8x ?

The solutions to the equation 5x^2+4=-8x are x=-4/5+i 2/5 ,x=-4/5-i 2/5

Find the zeros of 5x^2+4=-8x

The zeros of 5x^2+4=-8x are x=-4/5+i 2/5 ,x=-4/5-i 2/5

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

Popular >

5 x^{2} + 4 = - 8 x

x = - \frac{4}{5} + i \frac{2}{5}, x = - \frac{4}{5} - i \frac{2}{5}

Solution steps

5 x^{2} + 4 = - 8 x

Move

8 x

to the left side

5 x^{2} + 4 + 8 x = 0

Write in the standard form

a x^{2} + b x + c = 0

5 x^{2} + 8 x + 4 = 0

Solve with the quadratic formula

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

Simplify

8^{2} - 4 \cdot 5 \cdot 4 : 4 i

x_{1, 2} = \frac{- 8 \pm 4 i}{2 \cdot 5}

Separate the solutions

x_{1} = \frac{- 8 + 4 i}{2 \cdot 5}, x_{2} = \frac{- 8 - 4 i}{2 \cdot 5}

x = \frac{- 8 + 4 i}{2 \cdot 5} : - \frac{4}{5} + i \frac{2}{5}

x = \frac{- 8 - 4 i}{2 \cdot 5} : - \frac{4}{5} - i \frac{2}{5}

The solutions to the quadratic equation are:

x = - \frac{4}{5} + i \frac{2}{5}, x = - \frac{4}{5} - i \frac{2}{5}

2^{x + 2} > 3^{3 x - 4}

7 x - 6 + 3 = 5 x + 2 x + 5

ln (e^{1})

36 x^{2} + 84 x = - 49

- 81 = 6 u - 13 u - 18

What are the solutions to the equation 5x^2+4=-8x ?
The solutions to the equation 5x^2+4=-8x are x=-4/5+i 2/5 ,x=-4/5-i 2/5
Find the zeros of 5x^2+4=-8x
The zeros of 5x^2+4=-8x are x=-4/5+i 2/5 ,x=-4/5-i 2/5