4x^2-15x+3=0

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Solution for 4x^2-15x+3=0 equation:


Simplifying
4x2 + -15x + 3 = 0

Reorder the terms:
3 + -15x + 4x2 = 0

Solving
3 + -15x + 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 + -3.75x + x2 = 0

Move the constant term to the right:

Add '-0.75' to each side of the equation.
0.75 + -3.75x + -0.75 + x2 = 0 + -0.75

Reorder the terms:
0.75 + -0.75 + -3.75x + x2 = 0 + -0.75

Combine like terms: 0.75 + -0.75 = 0.00
0.00 + -3.75x + x2 = 0 + -0.75
-3.75x + x2 = 0 + -0.75

Combine like terms: 0 + -0.75 = -0.75
-3.75x + x2 = -0.75

The x term is -3.75x.  Take half its coefficient (-1.875).
Square it (3.515625) and add it to both sides.

Add '3.515625' to each side of the equation.
-3.75x + 3.515625 + x2 = -0.75 + 3.515625

Reorder the terms:
3.515625 + -3.75x + x2 = -0.75 + 3.515625

Combine like terms: -0.75 + 3.515625 = 2.765625
3.515625 + -3.75x + x2 = 2.765625

Factor a perfect square on the left side:
(x + -1.875)(x + -1.875) = 2.765625

Calculate the square root of the right side: 1.663016837

Break this problem into two subproblems by setting 
(x + -1.875) equal to 1.663016837 and -1.663016837.

Subproblem 1

x + -1.875 = 1.663016837 Simplifying x + -1.875 = 1.663016837 Reorder the terms: -1.875 + x = 1.663016837 Solving -1.875 + x = 1.663016837 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.875' to each side of the equation. -1.875 + 1.875 + x = 1.663016837 + 1.875 Combine like terms: -1.875 + 1.875 = 0.000 0.000 + x = 1.663016837 + 1.875 x = 1.663016837 + 1.875 Combine like terms: 1.663016837 + 1.875 = 3.538016837 x = 3.538016837 Simplifying x = 3.538016837

Subproblem 2

x + -1.875 = -1.663016837 Simplifying x + -1.875 = -1.663016837 Reorder the terms: -1.875 + x = -1.663016837 Solving -1.875 + x = -1.663016837 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.875' to each side of the equation. -1.875 + 1.875 + x = -1.663016837 + 1.875 Combine like terms: -1.875 + 1.875 = 0.000 0.000 + x = -1.663016837 + 1.875 x = -1.663016837 + 1.875 Combine like terms: -1.663016837 + 1.875 = 0.211983163 x = 0.211983163 Simplifying x = 0.211983163

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.538016837, 0.211983163}

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