Solve by Completing the Square x^2+2x+37=0

$x^{2} + 2 x + 37 = 0$

Step 1

Subtract $37$ from both sides of the equation.

$x^{2} + 2 x = - 37$

Step 2

To create a trinomial square on the left side of the equation, find a value that is equal to the square of half of $b$ .

${(\frac{b}{2})}^{2} = {(1)}^{2}$

Step 3

Add the term to each side of the equation.

$x^{2} + 2 x + {(1)}^{2} = - 37 + {(1)}^{2}$

Step 4

Simplify the equation.

Simplify the left side.

One to any power is one.

$x^{2} + 2 x + 1 = - 37 + {(1)}^{2}$

Simplify the right side.

Simplify $- 37 + {(1)}^{2}$ .

One to any power is one.

$x^{2} + 2 x + 1 = - 37 + 1$

Add $- 37$ and $1$ .

$x^{2} + 2 x + 1 = - 36$

Step 5

Factor the perfect trinomial square into ${(x + 1)}^{2}$ .

${(x + 1)}^{2} = - 36$

Step 6

Solve the equation for $x$ .

Take the specified root of both sides of the equation to eliminate the exponent on the left side.

$x + 1 = \pm \sqrt{- 36}$

Simplify $\pm \sqrt{- 36}$ .

Rewrite $- 36$ as $- 1 (36)$ .

$x + 1 = \pm \sqrt{- 1 (36)}$

Rewrite $\sqrt{- 1 (36)}$ as $\sqrt{- 1} \cdot \sqrt{36}$ .

$x + 1 = \pm \sqrt{- 1} \cdot \sqrt{36}$

Rewrite $\sqrt{- 1}$ as $i$ .

$x + 1 = \pm i \cdot \sqrt{36}$

Rewrite $36$ as $6^{2}$ .

$x + 1 = \pm i \cdot \sqrt{6^{2}}$

Pull terms out from under the radical, assuming positive real numbers.

$x + 1 = \pm i \cdot 6$

Move $6$ to the left of $i$ .

$x + 1 = \pm 6 i$

Move all terms not containing $x$ to the right side of the equation.

Subtract $1$ from both sides of the equation.

$x = \pm 6 i - 1$

Reorder $\pm 6 i$ and $- 1$ .

$x = - 1 \pm 6 i$

Solve by Completing the Square x^2+2x+37=0

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