5x^2+10x+25=18

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Solution for 5x^2+10x+25=18 equation:


Simplifying
5x2 + 10x + 25 = 18

Reorder the terms:
25 + 10x + 5x2 = 18

Solving
25 + 10x + 5x2 = 18

Solving for variable 'x'.

Reorder the terms:
25 + -18 + 10x + 5x2 = 18 + -18

Combine like terms: 25 + -18 = 7
7 + 10x + 5x2 = 18 + -18

Combine like terms: 18 + -18 = 0
7 + 10x + 5x2 = 0

Begin completing the square.  Divide all terms by
5 the coefficient of the squared term: 

Divide each side by '5'.
1.4 + 2x + x2 = 0

Move the constant term to the right:

Add '-1.4' to each side of the equation.
1.4 + 2x + -1.4 + x2 = 0 + -1.4

Reorder the terms:
1.4 + -1.4 + 2x + x2 = 0 + -1.4

Combine like terms: 1.4 + -1.4 = 0.0
0.0 + 2x + x2 = 0 + -1.4
2x + x2 = 0 + -1.4

Combine like terms: 0 + -1.4 = -1.4
2x + x2 = -1.4

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 = -1.4 + 1

Reorder the terms:
1 + 2x + x2 = -1.4 + 1

Combine like terms: -1.4 + 1 = -0.4
1 + 2x + x2 = -0.4

Factor a perfect square on the left side:
(x + 1)(x + 1) = -0.4

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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