What are the solutions to the equation 2x^2+4x=30 ?

The solutions to the equation 2x^2+4x=30 are x=3,x=-5

Find the zeros of 2x^2+4x=30

The zeros of 2x^2+4x=30 are x=3,x=-5

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

Popular >

2 x^{2} + 4 x = 30

x = 3, x = - 5

Solution steps

2 x^{2} + 4 x = 30

Move

30

to the left side

2 x^{2} + 4 x - 30 = 0

Solve with the quadratic formula

x_{1, 2} = \frac{- 4 \pm 4 ^{2} - 4 \cdot 2 ( - 30 )}{2 \cdot 2}

4^{2} - 4 \cdot 2 (- 30) = 16

x_{1, 2} = \frac{- 4 \pm 16}{2 \cdot 2}

Separate the solutions

x_{1} = \frac{- 4 + 16}{2 \cdot 2}, x_{2} = \frac{- 4 - 16}{2 \cdot 2}

x = \frac{- 4 + 16}{2 \cdot 2} : 3

x = \frac{- 4 - 16}{2 \cdot 2} : - 5

The solutions to the quadratic equation are:

x = 3, x = - 5

(3 n - 10) + (n + 20) + n = 180

3 x^{2} = - 4 x

(\frac{5}{7})^{- 2}

(x + 4)^{2} - 2 x - 8

What are the solutions to the equation 2x^2+4x=30 ?
The solutions to the equation 2x^2+4x=30 are x=3,x=-5
Find the zeros of 2x^2+4x=30
The zeros of 2x^2+4x=30 are x=3,x=-5