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

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

Find the zeros of x^2+2x=8

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

Popular >

x^{2} + 2 x = 8

x = 2, x = - 4

Solution steps

x^{2} + 2 x = 8

Move

8

to the left side

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

Solve with the quadratic formula

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

2^{2} - 4 \cdot 1 \cdot (- 8) = 6

x_{1, 2} = \frac{- 2 \pm 6}{2 \cdot 1}

Separate the solutions

x_{1} = \frac{- 2 + 6}{2 \cdot 1}, x_{2} = \frac{- 2 - 6}{2 \cdot 1}

x = \frac{- 2 + 6}{2 \cdot 1} : 2

x = \frac{- 2 - 6}{2 \cdot 1} : - 4

The solutions to the quadratic equation are:

x = 2, x = - 4

1420 - 3125

(- 7)^{- 1}

\frac{3 x}{4} - \frac{1}{5} + 2 x = \frac{5}{4} - \frac{3 x}{20}

- \frac{4}{3} \cdot 9

\frac{( 2 - i )}{3 + 2 i}

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