4x^2-11x=1

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Solution for 4x^2-11x=1 equation:


Simplifying
4x2 + -11x = 1

Reorder the terms:
-11x + 4x2 = 1

Solving
-11x + 4x2 = 1

Solving for variable 'x'.

Reorder the terms:
-1 + -11x + 4x2 = 1 + -1

Combine like terms: 1 + -1 = 0
-1 + -11x + 4x2 = 0

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

Divide each side by '4'.
-0.25 + -2.75x + x2 = 0

Move the constant term to the right:

Add '0.25' to each side of the equation.
-0.25 + -2.75x + 0.25 + x2 = 0 + 0.25

Reorder the terms:
-0.25 + 0.25 + -2.75x + x2 = 0 + 0.25

Combine like terms: -0.25 + 0.25 = 0.00
0.00 + -2.75x + x2 = 0 + 0.25
-2.75x + x2 = 0 + 0.25

Combine like terms: 0 + 0.25 = 0.25
-2.75x + x2 = 0.25

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 = 0.25 + 1.890625

Reorder the terms:
1.890625 + -2.75x + x2 = 0.25 + 1.890625

Combine like terms: 0.25 + 1.890625 = 2.140625
1.890625 + -2.75x + x2 = 2.140625

Factor a perfect square on the left side:
(x + -1.375)(x + -1.375) = 2.140625

Calculate the square root of the right side: 1.463087489

Break this problem into two subproblems by setting 
(x + -1.375) equal to 1.463087489 and -1.463087489.

Subproblem 1

x + -1.375 = 1.463087489 Simplifying x + -1.375 = 1.463087489 Reorder the terms: -1.375 + x = 1.463087489 Solving -1.375 + x = 1.463087489 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 = 1.463087489 + 1.375 Combine like terms: -1.375 + 1.375 = 0.000 0.000 + x = 1.463087489 + 1.375 x = 1.463087489 + 1.375 Combine like terms: 1.463087489 + 1.375 = 2.838087489 x = 2.838087489 Simplifying x = 2.838087489

Subproblem 2

x + -1.375 = -1.463087489 Simplifying x + -1.375 = -1.463087489 Reorder the terms: -1.375 + x = -1.463087489 Solving -1.375 + x = -1.463087489 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 = -1.463087489 + 1.375 Combine like terms: -1.375 + 1.375 = 0.000 0.000 + x = -1.463087489 + 1.375 x = -1.463087489 + 1.375 Combine like terms: -1.463087489 + 1.375 = -0.088087489 x = -0.088087489 Simplifying x = -0.088087489

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.838087489, -0.088087489}

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