4x^2-69x+26=7x^2-8

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Solution for 4x^2-69x+26=7x^2-8 equation:


Simplifying
4x2 + -69x + 26 = 7x2 + -8

Reorder the terms:
26 + -69x + 4x2 = 7x2 + -8

Reorder the terms:
26 + -69x + 4x2 = -8 + 7x2

Solving
26 + -69x + 4x2 = -8 + 7x2

Solving for variable 'x'.

Reorder the terms:
26 + 8 + -69x + 4x2 + -7x2 = -8 + 7x2 + 8 + -7x2

Combine like terms: 26 + 8 = 34
34 + -69x + 4x2 + -7x2 = -8 + 7x2 + 8 + -7x2

Combine like terms: 4x2 + -7x2 = -3x2
34 + -69x + -3x2 = -8 + 7x2 + 8 + -7x2

Reorder the terms:
34 + -69x + -3x2 = -8 + 8 + 7x2 + -7x2

Combine like terms: -8 + 8 = 0
34 + -69x + -3x2 = 0 + 7x2 + -7x2
34 + -69x + -3x2 = 7x2 + -7x2

Combine like terms: 7x2 + -7x2 = 0
34 + -69x + -3x2 = 0

Begin completing the square.  Divide all terms by
-3 the coefficient of the squared term: 

Divide each side by '-3'.
-11.33333333 + 23x + x2 = 0

Move the constant term to the right:

Add '11.33333333' to each side of the equation.
-11.33333333 + 23x + 11.33333333 + x2 = 0 + 11.33333333

Reorder the terms:
-11.33333333 + 11.33333333 + 23x + x2 = 0 + 11.33333333

Combine like terms: -11.33333333 + 11.33333333 = 0.00000000
0.00000000 + 23x + x2 = 0 + 11.33333333
23x + x2 = 0 + 11.33333333

Combine like terms: 0 + 11.33333333 = 11.33333333
23x + x2 = 11.33333333

The x term is 23x.  Take half its coefficient (11.5).
Square it (132.25) and add it to both sides.

Add '132.25' to each side of the equation.
23x + 132.25 + x2 = 11.33333333 + 132.25

Reorder the terms:
132.25 + 23x + x2 = 11.33333333 + 132.25

Combine like terms: 11.33333333 + 132.25 = 143.58333333
132.25 + 23x + x2 = 143.58333333

Factor a perfect square on the left side:
(x + 11.5)(x + 11.5) = 143.58333333

Calculate the square root of the right side: 11.982626312

Break this problem into two subproblems by setting 
(x + 11.5) equal to 11.982626312 and -11.982626312.

Subproblem 1

x + 11.5 = 11.982626312 Simplifying x + 11.5 = 11.982626312 Reorder the terms: 11.5 + x = 11.982626312 Solving 11.5 + x = 11.982626312 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-11.5' to each side of the equation. 11.5 + -11.5 + x = 11.982626312 + -11.5 Combine like terms: 11.5 + -11.5 = 0.0 0.0 + x = 11.982626312 + -11.5 x = 11.982626312 + -11.5 Combine like terms: 11.982626312 + -11.5 = 0.482626312 x = 0.482626312 Simplifying x = 0.482626312

Subproblem 2

x + 11.5 = -11.982626312 Simplifying x + 11.5 = -11.982626312 Reorder the terms: 11.5 + x = -11.982626312 Solving 11.5 + x = -11.982626312 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-11.5' to each side of the equation. 11.5 + -11.5 + x = -11.982626312 + -11.5 Combine like terms: 11.5 + -11.5 = 0.0 0.0 + x = -11.982626312 + -11.5 x = -11.982626312 + -11.5 Combine like terms: -11.982626312 + -11.5 = -23.482626312 x = -23.482626312 Simplifying x = -23.482626312

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.482626312, -23.482626312}

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