x^2+2x+25=7

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Solution for x^2+2x+25=7 equation:


Simplifying
x2 + 2x + 25 = 7

Reorder the terms:
25 + 2x + x2 = 7

Solving
25 + 2x + x2 = 7

Solving for variable 'x'.

Reorder the terms:
25 + -7 + 2x + x2 = 7 + -7

Combine like terms: 25 + -7 = 18
18 + 2x + x2 = 7 + -7

Combine like terms: 7 + -7 = 0
18 + 2x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-18' to each side of the equation.
18 + 2x + -18 + x2 = 0 + -18

Reorder the terms:
18 + -18 + 2x + x2 = 0 + -18

Combine like terms: 18 + -18 = 0
0 + 2x + x2 = 0 + -18
2x + x2 = 0 + -18

Combine like terms: 0 + -18 = -18
2x + x2 = -18

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 = -18 + 1

Reorder the terms:
1 + 2x + x2 = -18 + 1

Combine like terms: -18 + 1 = -17
1 + 2x + x2 = -17

Factor a perfect square on the left side:
(x + 1)(x + 1) = -17

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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