4x(4x-11)=11

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Solution for 4x(4x-11)=11 equation:


Simplifying
4x(4x + -11) = 11

Reorder the terms:
4x(-11 + 4x) = 11
(-11 * 4x + 4x * 4x) = 11
(-44x + 16x2) = 11

Solving
-44x + 16x2 = 11

Solving for variable 'x'.

Reorder the terms:
-11 + -44x + 16x2 = 11 + -11

Combine like terms: 11 + -11 = 0
-11 + -44x + 16x2 = 0

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

Divide each side by '16'.
-0.6875 + -2.75x + x2 = 0

Move the constant term to the right:

Add '0.6875' to each side of the equation.
-0.6875 + -2.75x + 0.6875 + x2 = 0 + 0.6875

Reorder the terms:
-0.6875 + 0.6875 + -2.75x + x2 = 0 + 0.6875

Combine like terms: -0.6875 + 0.6875 = 0.0000
0.0000 + -2.75x + x2 = 0 + 0.6875
-2.75x + x2 = 0 + 0.6875

Combine like terms: 0 + 0.6875 = 0.6875
-2.75x + x2 = 0.6875

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 = 0.6875 + 1.890625

Reorder the terms:
1.890625 + -2.75x + x2 = 0.6875 + 1.890625

Combine like terms: 0.6875 + 1.890625 = 2.578125
1.890625 + -2.75x + x2 = 2.578125

Factor a perfect square on the left side:
(x + -1.375)(x + -1.375) = 2.578125

Calculate the square root of the right side: 1.605654072

Break this problem into two subproblems by setting 
(x + -1.375) equal to 1.605654072 and -1.605654072.

Subproblem 1

x + -1.375 = 1.605654072 Simplifying x + -1.375 = 1.605654072 Reorder the terms: -1.375 + x = 1.605654072 Solving -1.375 + x = 1.605654072 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 = 1.605654072 + 1.375 Combine like terms: -1.375 + 1.375 = 0.000 0.000 + x = 1.605654072 + 1.375 x = 1.605654072 + 1.375 Combine like terms: 1.605654072 + 1.375 = 2.980654072 x = 2.980654072 Simplifying x = 2.980654072

Subproblem 2

x + -1.375 = -1.605654072 Simplifying x + -1.375 = -1.605654072 Reorder the terms: -1.375 + x = -1.605654072 Solving -1.375 + x = -1.605654072 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 = -1.605654072 + 1.375 Combine like terms: -1.375 + 1.375 = 0.000 0.000 + x = -1.605654072 + 1.375 x = -1.605654072 + 1.375 Combine like terms: -1.605654072 + 1.375 = -0.230654072 x = -0.230654072 Simplifying x = -0.230654072

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.980654072, -0.230654072}

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