4x^2-26x+42.25=0

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Solution for 4x^2-26x+42.25=0 equation:


Simplifying
4x2 + -26x + 42.25 = 0

Reorder the terms:
42.25 + -26x + 4x2 = 0

Solving
42.25 + -26x + 4x2 = 0

Solving for variable 'x'.

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

Divide each side by '4'.
10.5625 + -6.5x + x2 = 0

Move the constant term to the right:

Add '-10.5625' to each side of the equation.
10.5625 + -6.5x + -10.5625 + x2 = 0 + -10.5625

Reorder the terms:
10.5625 + -10.5625 + -6.5x + x2 = 0 + -10.5625

Combine like terms: 10.5625 + -10.5625 = 0.0000
0.0000 + -6.5x + x2 = 0 + -10.5625
-6.5x + x2 = 0 + -10.5625

Combine like terms: 0 + -10.5625 = -10.5625
-6.5x + x2 = -10.5625

The x term is -6.5x.  Take half its coefficient (-3.25).
Square it (10.5625) and add it to both sides.

Add '10.5625' to each side of the equation.
-6.5x + 10.5625 + x2 = -10.5625 + 10.5625

Reorder the terms:
10.5625 + -6.5x + x2 = -10.5625 + 10.5625

Combine like terms: -10.5625 + 10.5625 = 0.0000
10.5625 + -6.5x + x2 = 0.0000

Factor a perfect square on the left side:
(x + -3.25)(x + -3.25) = 0.0000

Calculate the square root of the right side: 0.0000

Break this problem into two subproblems by setting 
(x + -3.25) equal to 0.0000 and 0.0000.

Subproblem 1

x + -3.25 = 0.0000 Simplifying x + -3.25 = 0.0000 Reorder the terms: -3.25 + x = 0.0000 Solving -3.25 + x = 0.0000 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.25' to each side of the equation. -3.25 + 3.25 + x = 0.0000 + 3.25 Combine like terms: -3.25 + 3.25 = 0.00 0.00 + x = 0.0000 + 3.25 x = 0.0000 + 3.25 Combine like terms: 0.0000 + 3.25 = 3.25 x = 3.25 Simplifying x = 3.25

Subproblem 2

x + -3.25 = 0.0000 Simplifying x + -3.25 = 0.0000 Reorder the terms: -3.25 + x = 0.0000 Solving -3.25 + x = 0.0000 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.25' to each side of the equation. -3.25 + 3.25 + x = 0.0000 + 3.25 Combine like terms: -3.25 + 3.25 = 0.00 0.00 + x = 0.0000 + 3.25 x = 0.0000 + 3.25 Combine like terms: 0.0000 + 3.25 = 3.25 x = 3.25 Simplifying x = 3.25

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.25, 3.25}

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