What are the solutions to the equation x(x+8)=20 ?

The solutions to the equation x(x+8)=20 are x=2,x=-10

Find the zeros of x(x+8)=20

The zeros of x(x+8)=20 are x=2,x=-10

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

Popular >

x (x + 8) = 20

x = 2, x = - 10

Solution steps

x (x + 8) = 20

Expand

x (x + 8) : x^{2} + 8 x

x^{2} + 8 x = 20

Move

20

to the left side

x^{2} + 8 x - 20 = 0

Solve with the quadratic formula

x_{1, 2} = \frac{- 8 \pm 8 ^{2} - 4 \cdot 1 \cdot ( - 20 )}{2 \cdot 1}

8^{2} - 4 \cdot 1 \cdot (- 20) = 12

x_{1, 2} = \frac{- 8 \pm 12}{2 \cdot 1}

Separate the solutions

x_{1} = \frac{- 8 + 12}{2 \cdot 1}, x_{2} = \frac{- 8 - 12}{2 \cdot 1}

x = \frac{- 8 + 12}{2 \cdot 1} : 2

x = \frac{- 8 - 12}{2 \cdot 1} : - 10

The solutions to the quadratic equation are:

x = 2, x = - 10

3 x^{2} - 18 x + 11

5 n^{2} + 7 n - 3 = 4 n

x^{2} - 11 x + 41 = 19

4 x^{2} - 3 (5 x - 1) = 0

- 0.1 x^{2} + 14 x + 3 = 1000

What are the solutions to the equation x(x+8)=20 ?
The solutions to the equation x(x+8)=20 are x=2,x=-10
Find the zeros of x(x+8)=20
The zeros of x(x+8)=20 are x=2,x=-10