4x^2+36x+64=25

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Solution for 4x^2+36x+64=25 equation:


Simplifying
4x2 + 36x + 64 = 25

Reorder the terms:
64 + 36x + 4x2 = 25

Solving
64 + 36x + 4x2 = 25

Solving for variable 'x'.

Reorder the terms:
64 + -25 + 36x + 4x2 = 25 + -25

Combine like terms: 64 + -25 = 39
39 + 36x + 4x2 = 25 + -25

Combine like terms: 25 + -25 = 0
39 + 36x + 4x2 = 0

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

Divide each side by '4'.
9.75 + 9x + x2 = 0

Move the constant term to the right:

Add '-9.75' to each side of the equation.
9.75 + 9x + -9.75 + x2 = 0 + -9.75

Reorder the terms:
9.75 + -9.75 + 9x + x2 = 0 + -9.75

Combine like terms: 9.75 + -9.75 = 0.00
0.00 + 9x + x2 = 0 + -9.75
9x + x2 = 0 + -9.75

Combine like terms: 0 + -9.75 = -9.75
9x + x2 = -9.75

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 = -9.75 + 20.25

Reorder the terms:
20.25 + 9x + x2 = -9.75 + 20.25

Combine like terms: -9.75 + 20.25 = 10.5
20.25 + 9x + x2 = 10.5

Factor a perfect square on the left side:
(x + 4.5)(x + 4.5) = 10.5

Calculate the square root of the right side: 3.240370349

Break this problem into two subproblems by setting 
(x + 4.5) equal to 3.240370349 and -3.240370349.

Subproblem 1

x + 4.5 = 3.240370349 Simplifying x + 4.5 = 3.240370349 Reorder the terms: 4.5 + x = 3.240370349 Solving 4.5 + x = 3.240370349 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 = 3.240370349 + -4.5 Combine like terms: 4.5 + -4.5 = 0.0 0.0 + x = 3.240370349 + -4.5 x = 3.240370349 + -4.5 Combine like terms: 3.240370349 + -4.5 = -1.259629651 x = -1.259629651 Simplifying x = -1.259629651

Subproblem 2

x + 4.5 = -3.240370349 Simplifying x + 4.5 = -3.240370349 Reorder the terms: 4.5 + x = -3.240370349 Solving 4.5 + x = -3.240370349 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 = -3.240370349 + -4.5 Combine like terms: 4.5 + -4.5 = 0.0 0.0 + x = -3.240370349 + -4.5 x = -3.240370349 + -4.5 Combine like terms: -3.240370349 + -4.5 = -7.740370349 x = -7.740370349 Simplifying x = -7.740370349

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-1.259629651, -7.740370349}

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