4x^2-17x-12=0

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Solution for 4x^2-17x-12=0 equation:


Simplifying
4x2 + -17x + -12 = 0

Reorder the terms:
-12 + -17x + 4x2 = 0

Solving
-12 + -17x + 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'.
-3 + -4.25x + x2 = 0

Move the constant term to the right:

Add '3' to each side of the equation.
-3 + -4.25x + 3 + x2 = 0 + 3

Reorder the terms:
-3 + 3 + -4.25x + x2 = 0 + 3

Combine like terms: -3 + 3 = 0
0 + -4.25x + x2 = 0 + 3
-4.25x + x2 = 0 + 3

Combine like terms: 0 + 3 = 3
-4.25x + x2 = 3

The x term is -4.25x.  Take half its coefficient (-2.125).
Square it (4.515625) and add it to both sides.

Add '4.515625' to each side of the equation.
-4.25x + 4.515625 + x2 = 3 + 4.515625

Reorder the terms:
4.515625 + -4.25x + x2 = 3 + 4.515625

Combine like terms: 3 + 4.515625 = 7.515625
4.515625 + -4.25x + x2 = 7.515625

Factor a perfect square on the left side:
(x + -2.125)(x + -2.125) = 7.515625

Calculate the square root of the right side: 2.741464025

Break this problem into two subproblems by setting 
(x + -2.125) equal to 2.741464025 and -2.741464025.

Subproblem 1

x + -2.125 = 2.741464025 Simplifying x + -2.125 = 2.741464025 Reorder the terms: -2.125 + x = 2.741464025 Solving -2.125 + x = 2.741464025 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.125' to each side of the equation. -2.125 + 2.125 + x = 2.741464025 + 2.125 Combine like terms: -2.125 + 2.125 = 0.000 0.000 + x = 2.741464025 + 2.125 x = 2.741464025 + 2.125 Combine like terms: 2.741464025 + 2.125 = 4.866464025 x = 4.866464025 Simplifying x = 4.866464025

Subproblem 2

x + -2.125 = -2.741464025 Simplifying x + -2.125 = -2.741464025 Reorder the terms: -2.125 + x = -2.741464025 Solving -2.125 + x = -2.741464025 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.125' to each side of the equation. -2.125 + 2.125 + x = -2.741464025 + 2.125 Combine like terms: -2.125 + 2.125 = 0.000 0.000 + x = -2.741464025 + 2.125 x = -2.741464025 + 2.125 Combine like terms: -2.741464025 + 2.125 = -0.616464025 x = -0.616464025 Simplifying x = -0.616464025

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.866464025, -0.616464025}

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