4x^2-5(4x)+3=0

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Solution for 4x^2-5(4x)+3=0 equation:


Simplifying
4x2 + -5(4x) + 3 = 0

Remove parenthesis around (4x)
4x2 + -5 * 4x + 3 = 0

Multiply -5 * 4
4x2 + -20x + 3 = 0

Reorder the terms:
3 + -20x + 4x2 = 0

Solving
3 + -20x + 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'.
0.75 + -5x + x2 = 0

Move the constant term to the right:

Add '-0.75' to each side of the equation.
0.75 + -5x + -0.75 + x2 = 0 + -0.75

Reorder the terms:
0.75 + -0.75 + -5x + x2 = 0 + -0.75

Combine like terms: 0.75 + -0.75 = 0.00
0.00 + -5x + x2 = 0 + -0.75
-5x + x2 = 0 + -0.75

Combine like terms: 0 + -0.75 = -0.75
-5x + x2 = -0.75

The x term is -5x.  Take half its coefficient (-2.5).
Square it (6.25) and add it to both sides.

Add '6.25' to each side of the equation.
-5x + 6.25 + x2 = -0.75 + 6.25

Reorder the terms:
6.25 + -5x + x2 = -0.75 + 6.25

Combine like terms: -0.75 + 6.25 = 5.5
6.25 + -5x + x2 = 5.5

Factor a perfect square on the left side:
(x + -2.5)(x + -2.5) = 5.5

Calculate the square root of the right side: 2.34520788

Break this problem into two subproblems by setting 
(x + -2.5) equal to 2.34520788 and -2.34520788.

Subproblem 1

x + -2.5 = 2.34520788 Simplifying x + -2.5 = 2.34520788 Reorder the terms: -2.5 + x = 2.34520788 Solving -2.5 + x = 2.34520788 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.5' to each side of the equation. -2.5 + 2.5 + x = 2.34520788 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + x = 2.34520788 + 2.5 x = 2.34520788 + 2.5 Combine like terms: 2.34520788 + 2.5 = 4.84520788 x = 4.84520788 Simplifying x = 4.84520788

Subproblem 2

x + -2.5 = -2.34520788 Simplifying x + -2.5 = -2.34520788 Reorder the terms: -2.5 + x = -2.34520788 Solving -2.5 + x = -2.34520788 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.5' to each side of the equation. -2.5 + 2.5 + x = -2.34520788 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + x = -2.34520788 + 2.5 x = -2.34520788 + 2.5 Combine like terms: -2.34520788 + 2.5 = 0.15479212 x = 0.15479212 Simplifying x = 0.15479212

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.84520788, 0.15479212}

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