4x^2+26x=72

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Solution for 4x^2+26x=72 equation:


Simplifying
4x2 + 26x = 72

Reorder the terms:
26x + 4x2 = 72

Solving
26x + 4x2 = 72

Solving for variable 'x'.

Reorder the terms:
-72 + 26x + 4x2 = 72 + -72

Combine like terms: 72 + -72 = 0
-72 + 26x + 4x2 = 0

Factor out the Greatest Common Factor (GCF), '2'.
2(-36 + 13x + 2x2) = 0

Ignore the factor 2.

Subproblem 1

Set the factor '(-36 + 13x + 2x2)' equal to zero and attempt to solve: Simplifying -36 + 13x + 2x2 = 0 Solving -36 + 13x + 2x2 = 0 Begin completing the square. Divide all terms by 2 the coefficient of the squared term: Divide each side by '2'. -18 + 6.5x + x2 = 0 Move the constant term to the right: Add '18' to each side of the equation. -18 + 6.5x + 18 + x2 = 0 + 18 Reorder the terms: -18 + 18 + 6.5x + x2 = 0 + 18 Combine like terms: -18 + 18 = 0 0 + 6.5x + x2 = 0 + 18 6.5x + x2 = 0 + 18 Combine like terms: 0 + 18 = 18 6.5x + x2 = 18 The x term is 6.5x. Take half its coefficient (3.25). Square it (10.5625) and add it to both sides. Add '10.5625' to each side of the equation. 6.5x + 10.5625 + x2 = 18 + 10.5625 Reorder the terms: 10.5625 + 6.5x + x2 = 18 + 10.5625 Combine like terms: 18 + 10.5625 = 28.5625 10.5625 + 6.5x + x2 = 28.5625 Factor a perfect square on the left side: (x + 3.25)(x + 3.25) = 28.5625 Calculate the square root of the right side: 5.344389582 Break this problem into two subproblems by setting (x + 3.25) equal to 5.344389582 and -5.344389582.

Subproblem 1

x + 3.25 = 5.344389582 Simplifying x + 3.25 = 5.344389582 Reorder the terms: 3.25 + x = 5.344389582 Solving 3.25 + x = 5.344389582 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.25' to each side of the equation. 3.25 + -3.25 + x = 5.344389582 + -3.25 Combine like terms: 3.25 + -3.25 = 0.00 0.00 + x = 5.344389582 + -3.25 x = 5.344389582 + -3.25 Combine like terms: 5.344389582 + -3.25 = 2.094389582 x = 2.094389582 Simplifying x = 2.094389582

Subproblem 2

x + 3.25 = -5.344389582 Simplifying x + 3.25 = -5.344389582 Reorder the terms: 3.25 + x = -5.344389582 Solving 3.25 + x = -5.344389582 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.25' to each side of the equation. 3.25 + -3.25 + x = -5.344389582 + -3.25 Combine like terms: 3.25 + -3.25 = 0.00 0.00 + x = -5.344389582 + -3.25 x = -5.344389582 + -3.25 Combine like terms: -5.344389582 + -3.25 = -8.594389582 x = -8.594389582 Simplifying x = -8.594389582

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.094389582, -8.594389582}

Solution

x = {2.094389582, -8.594389582}

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