4x^2+36x+25=0

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Solution for 4x^2+36x+25=0 equation:


Simplifying
4x2 + 36x + 25 = 0

Reorder the terms:
25 + 36x + 4x2 = 0

Solving
25 + 36x + 4x2 = 0

Solving for variable 'x'.

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

Divide each side by '4'.
6.25 + 9x + x2 = 0

Move the constant term to the right:

Add '-6.25' to each side of the equation.
6.25 + 9x + -6.25 + x2 = 0 + -6.25

Reorder the terms:
6.25 + -6.25 + 9x + x2 = 0 + -6.25

Combine like terms: 6.25 + -6.25 = 0.00
0.00 + 9x + x2 = 0 + -6.25
9x + x2 = 0 + -6.25

Combine like terms: 0 + -6.25 = -6.25
9x + x2 = -6.25

The x term is 9x.  Take half its coefficient (4.5).
Square it (20.25) and add it to both sides.

Add '20.25' to each side of the equation.
9x + 20.25 + x2 = -6.25 + 20.25

Reorder the terms:
20.25 + 9x + x2 = -6.25 + 20.25

Combine like terms: -6.25 + 20.25 = 14
20.25 + 9x + x2 = 14

Factor a perfect square on the left side:
(x + 4.5)(x + 4.5) = 14

Calculate the square root of the right side: 3.741657387

Break this problem into two subproblems by setting 
(x + 4.5) equal to 3.741657387 and -3.741657387.

Subproblem 1

x + 4.5 = 3.741657387 Simplifying x + 4.5 = 3.741657387 Reorder the terms: 4.5 + x = 3.741657387 Solving 4.5 + x = 3.741657387 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4.5' to each side of the equation. 4.5 + -4.5 + x = 3.741657387 + -4.5 Combine like terms: 4.5 + -4.5 = 0.0 0.0 + x = 3.741657387 + -4.5 x = 3.741657387 + -4.5 Combine like terms: 3.741657387 + -4.5 = -0.758342613 x = -0.758342613 Simplifying x = -0.758342613

Subproblem 2

x + 4.5 = -3.741657387 Simplifying x + 4.5 = -3.741657387 Reorder the terms: 4.5 + x = -3.741657387 Solving 4.5 + x = -3.741657387 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4.5' to each side of the equation. 4.5 + -4.5 + x = -3.741657387 + -4.5 Combine like terms: 4.5 + -4.5 = 0.0 0.0 + x = -3.741657387 + -4.5 x = -3.741657387 + -4.5 Combine like terms: -3.741657387 + -4.5 = -8.241657387 x = -8.241657387 Simplifying x = -8.241657387

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.758342613, -8.241657387}

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