x^2+2x+18=3

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Solution for x^2+2x+18=3 equation:


Simplifying
x2 + 2x + 18 = 3

Reorder the terms:
18 + 2x + x2 = 3

Solving
18 + 2x + x2 = 3

Solving for variable 'x'.

Reorder the terms:
18 + -3 + 2x + x2 = 3 + -3

Combine like terms: 18 + -3 = 15
15 + 2x + x2 = 3 + -3

Combine like terms: 3 + -3 = 0
15 + 2x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-15' to each side of the equation.
15 + 2x + -15 + x2 = 0 + -15

Reorder the terms:
15 + -15 + 2x + x2 = 0 + -15

Combine like terms: 15 + -15 = 0
0 + 2x + x2 = 0 + -15
2x + x2 = 0 + -15

Combine like terms: 0 + -15 = -15
2x + x2 = -15

The x term is 2x.  Take half its coefficient (1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
2x + 1 + x2 = -15 + 1

Reorder the terms:
1 + 2x + x2 = -15 + 1

Combine like terms: -15 + 1 = -14
1 + 2x + x2 = -14

Factor a perfect square on the left side:
(x + 1)(x + 1) = -14

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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