4x^2+11x=59

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Solution for 4x^2+11x=59 equation:


Simplifying
4x2 + 11x = 59

Reorder the terms:
11x + 4x2 = 59

Solving
11x + 4x2 = 59

Solving for variable 'x'.

Reorder the terms:
-59 + 11x + 4x2 = 59 + -59

Combine like terms: 59 + -59 = 0
-59 + 11x + 4x2 = 0

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

Divide each side by '4'.
-14.75 + 2.75x + x2 = 0

Move the constant term to the right:

Add '14.75' to each side of the equation.
-14.75 + 2.75x + 14.75 + x2 = 0 + 14.75

Reorder the terms:
-14.75 + 14.75 + 2.75x + x2 = 0 + 14.75

Combine like terms: -14.75 + 14.75 = 0.00
0.00 + 2.75x + x2 = 0 + 14.75
2.75x + x2 = 0 + 14.75

Combine like terms: 0 + 14.75 = 14.75
2.75x + x2 = 14.75

The x term is 2.75x.  Take half its coefficient (1.375).
Square it (1.890625) and add it to both sides.

Add '1.890625' to each side of the equation.
2.75x + 1.890625 + x2 = 14.75 + 1.890625

Reorder the terms:
1.890625 + 2.75x + x2 = 14.75 + 1.890625

Combine like terms: 14.75 + 1.890625 = 16.640625
1.890625 + 2.75x + x2 = 16.640625

Factor a perfect square on the left side:
(x + 1.375)(x + 1.375) = 16.640625

Calculate the square root of the right side: 4.079292218

Break this problem into two subproblems by setting 
(x + 1.375) equal to 4.079292218 and -4.079292218.

Subproblem 1

x + 1.375 = 4.079292218 Simplifying x + 1.375 = 4.079292218 Reorder the terms: 1.375 + x = 4.079292218 Solving 1.375 + x = 4.079292218 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.375' to each side of the equation. 1.375 + -1.375 + x = 4.079292218 + -1.375 Combine like terms: 1.375 + -1.375 = 0.000 0.000 + x = 4.079292218 + -1.375 x = 4.079292218 + -1.375 Combine like terms: 4.079292218 + -1.375 = 2.704292218 x = 2.704292218 Simplifying x = 2.704292218

Subproblem 2

x + 1.375 = -4.079292218 Simplifying x + 1.375 = -4.079292218 Reorder the terms: 1.375 + x = -4.079292218 Solving 1.375 + x = -4.079292218 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.375' to each side of the equation. 1.375 + -1.375 + x = -4.079292218 + -1.375 Combine like terms: 1.375 + -1.375 = 0.000 0.000 + x = -4.079292218 + -1.375 x = -4.079292218 + -1.375 Combine like terms: -4.079292218 + -1.375 = -5.454292218 x = -5.454292218 Simplifying x = -5.454292218

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.704292218, -5.454292218}

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