-4x^2-24x+9=0

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Solution for -4x^2-24x+9=0 equation:


Simplifying
-4x2 + -24x + 9 = 0

Reorder the terms:
9 + -24x + -4x2 = 0

Solving
9 + -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'.
-2.25 + 6x + x2 = 0

Move the constant term to the right:

Add '2.25' to each side of the equation.
-2.25 + 6x + 2.25 + x2 = 0 + 2.25

Reorder the terms:
-2.25 + 2.25 + 6x + x2 = 0 + 2.25

Combine like terms: -2.25 + 2.25 = 0.00
0.00 + 6x + x2 = 0 + 2.25
6x + x2 = 0 + 2.25

Combine like terms: 0 + 2.25 = 2.25
6x + x2 = 2.25

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 = 2.25 + 9

Reorder the terms:
9 + 6x + x2 = 2.25 + 9

Combine like terms: 2.25 + 9 = 11.25
9 + 6x + x2 = 11.25

Factor a perfect square on the left side:
(x + 3)(x + 3) = 11.25

Calculate the square root of the right side: 3.354101966

Break this problem into two subproblems by setting 
(x + 3) equal to 3.354101966 and -3.354101966.

Subproblem 1

x + 3 = 3.354101966 Simplifying x + 3 = 3.354101966 Reorder the terms: 3 + x = 3.354101966 Solving 3 + x = 3.354101966 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 = 3.354101966 + -3 Combine like terms: 3 + -3 = 0 0 + x = 3.354101966 + -3 x = 3.354101966 + -3 Combine like terms: 3.354101966 + -3 = 0.354101966 x = 0.354101966 Simplifying x = 0.354101966

Subproblem 2

x + 3 = -3.354101966 Simplifying x + 3 = -3.354101966 Reorder the terms: 3 + x = -3.354101966 Solving 3 + x = -3.354101966 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 = -3.354101966 + -3 Combine like terms: 3 + -3 = 0 0 + x = -3.354101966 + -3 x = -3.354101966 + -3 Combine like terms: -3.354101966 + -3 = -6.354101966 x = -6.354101966 Simplifying x = -6.354101966

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.354101966, -6.354101966}

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