4x^2+11x=63

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Solution for 4x^2+11x=63 equation:


Simplifying
4x2 + 11x = 63

Reorder the terms:
11x + 4x2 = 63

Solving
11x + 4x2 = 63

Solving for variable 'x'.

Reorder the terms:
-63 + 11x + 4x2 = 63 + -63

Combine like terms: 63 + -63 = 0
-63 + 11x + 4x2 = 0

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

Divide each side by '4'.
-15.75 + 2.75x + x2 = 0

Move the constant term to the right:

Add '15.75' to each side of the equation.
-15.75 + 2.75x + 15.75 + x2 = 0 + 15.75

Reorder the terms:
-15.75 + 15.75 + 2.75x + x2 = 0 + 15.75

Combine like terms: -15.75 + 15.75 = 0.00
0.00 + 2.75x + x2 = 0 + 15.75
2.75x + x2 = 0 + 15.75

Combine like terms: 0 + 15.75 = 15.75
2.75x + x2 = 15.75

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 = 15.75 + 1.890625

Reorder the terms:
1.890625 + 2.75x + x2 = 15.75 + 1.890625

Combine like terms: 15.75 + 1.890625 = 17.640625
1.890625 + 2.75x + x2 = 17.640625

Factor a perfect square on the left side:
(x + 1.375)(x + 1.375) = 17.640625

Calculate the square root of the right side: 4.200074404

Break this problem into two subproblems by setting 
(x + 1.375) equal to 4.200074404 and -4.200074404.

Subproblem 1

x + 1.375 = 4.200074404 Simplifying x + 1.375 = 4.200074404 Reorder the terms: 1.375 + x = 4.200074404 Solving 1.375 + x = 4.200074404 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 = 4.200074404 + -1.375 Combine like terms: 1.375 + -1.375 = 0.000 0.000 + x = 4.200074404 + -1.375 x = 4.200074404 + -1.375 Combine like terms: 4.200074404 + -1.375 = 2.825074404 x = 2.825074404 Simplifying x = 2.825074404

Subproblem 2

x + 1.375 = -4.200074404 Simplifying x + 1.375 = -4.200074404 Reorder the terms: 1.375 + x = -4.200074404 Solving 1.375 + x = -4.200074404 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 = -4.200074404 + -1.375 Combine like terms: 1.375 + -1.375 = 0.000 0.000 + x = -4.200074404 + -1.375 x = -4.200074404 + -1.375 Combine like terms: -4.200074404 + -1.375 = -5.575074404 x = -5.575074404 Simplifying x = -5.575074404

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.825074404, -5.575074404}

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