4x^2+24x-15=0

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Solution for 4x^2+24x-15=0 equation:


Simplifying
4x2 + 24x + -15 = 0

Reorder the terms:
-15 + 24x + 4x2 = 0

Solving
-15 + 24x + 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'.
-3.75 + 6x + x2 = 0

Move the constant term to the right:

Add '3.75' to each side of the equation.
-3.75 + 6x + 3.75 + x2 = 0 + 3.75

Reorder the terms:
-3.75 + 3.75 + 6x + x2 = 0 + 3.75

Combine like terms: -3.75 + 3.75 = 0.00
0.00 + 6x + x2 = 0 + 3.75
6x + x2 = 0 + 3.75

Combine like terms: 0 + 3.75 = 3.75
6x + x2 = 3.75

The x term is 6x.  Take half its coefficient (3).
Square it (9) and add it to both sides.

Add '9' to each side of the equation.
6x + 9 + x2 = 3.75 + 9

Reorder the terms:
9 + 6x + x2 = 3.75 + 9

Combine like terms: 3.75 + 9 = 12.75
9 + 6x + x2 = 12.75

Factor a perfect square on the left side:
(x + 3)(x + 3) = 12.75

Calculate the square root of the right side: 3.570714214

Break this problem into two subproblems by setting 
(x + 3) equal to 3.570714214 and -3.570714214.

Subproblem 1

x + 3 = 3.570714214 Simplifying x + 3 = 3.570714214 Reorder the terms: 3 + x = 3.570714214 Solving 3 + x = 3.570714214 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + x = 3.570714214 + -3 Combine like terms: 3 + -3 = 0 0 + x = 3.570714214 + -3 x = 3.570714214 + -3 Combine like terms: 3.570714214 + -3 = 0.570714214 x = 0.570714214 Simplifying x = 0.570714214

Subproblem 2

x + 3 = -3.570714214 Simplifying x + 3 = -3.570714214 Reorder the terms: 3 + x = -3.570714214 Solving 3 + x = -3.570714214 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + x = -3.570714214 + -3 Combine like terms: 3 + -3 = 0 0 + x = -3.570714214 + -3 x = -3.570714214 + -3 Combine like terms: -3.570714214 + -3 = -6.570714214 x = -6.570714214 Simplifying x = -6.570714214

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.570714214, -6.570714214}

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