4x^2-3x-9-(2x^2+22x+27)=0

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Solution for 4x^2-3x-9-(2x^2+22x+27)=0 equation:


Simplifying
4x2 + -3x + -9 + -1(2x2 + 22x + 27) = 0

Reorder the terms:
4x2 + -3x + -9 + -1(27 + 22x + 2x2) = 0
4x2 + -3x + -9 + (27 * -1 + 22x * -1 + 2x2 * -1) = 0
4x2 + -3x + -9 + (-27 + -22x + -2x2) = 0

Reorder the terms:
-9 + -27 + -3x + -22x + 4x2 + -2x2 = 0

Combine like terms: -9 + -27 = -36
-36 + -3x + -22x + 4x2 + -2x2 = 0

Combine like terms: -3x + -22x = -25x
-36 + -25x + 4x2 + -2x2 = 0

Combine like terms: 4x2 + -2x2 = 2x2
-36 + -25x + 2x2 = 0

Solving
-36 + -25x + 2x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
2 the coefficient of the squared term: 

Divide each side by '2'.
-18 + -12.5x + x2 = 0

Move the constant term to the right:

Add '18' to each side of the equation.
-18 + -12.5x + 18 + x2 = 0 + 18

Reorder the terms:
-18 + 18 + -12.5x + x2 = 0 + 18

Combine like terms: -18 + 18 = 0
0 + -12.5x + x2 = 0 + 18
-12.5x + x2 = 0 + 18

Combine like terms: 0 + 18 = 18
-12.5x + x2 = 18

The x term is -12.5x.  Take half its coefficient (-6.25).
Square it (39.0625) and add it to both sides.

Add '39.0625' to each side of the equation.
-12.5x + 39.0625 + x2 = 18 + 39.0625

Reorder the terms:
39.0625 + -12.5x + x2 = 18 + 39.0625

Combine like terms: 18 + 39.0625 = 57.0625
39.0625 + -12.5x + x2 = 57.0625

Factor a perfect square on the left side:
(x + -6.25)(x + -6.25) = 57.0625

Calculate the square root of the right side: 7.553972465

Break this problem into two subproblems by setting 
(x + -6.25) equal to 7.553972465 and -7.553972465.

Subproblem 1

x + -6.25 = 7.553972465 Simplifying x + -6.25 = 7.553972465 Reorder the terms: -6.25 + x = 7.553972465 Solving -6.25 + x = 7.553972465 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '6.25' to each side of the equation. -6.25 + 6.25 + x = 7.553972465 + 6.25 Combine like terms: -6.25 + 6.25 = 0.00 0.00 + x = 7.553972465 + 6.25 x = 7.553972465 + 6.25 Combine like terms: 7.553972465 + 6.25 = 13.803972465 x = 13.803972465 Simplifying x = 13.803972465

Subproblem 2

x + -6.25 = -7.553972465 Simplifying x + -6.25 = -7.553972465 Reorder the terms: -6.25 + x = -7.553972465 Solving -6.25 + x = -7.553972465 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '6.25' to each side of the equation. -6.25 + 6.25 + x = -7.553972465 + 6.25 Combine like terms: -6.25 + 6.25 = 0.00 0.00 + x = -7.553972465 + 6.25 x = -7.553972465 + 6.25 Combine like terms: -7.553972465 + 6.25 = -1.303972465 x = -1.303972465 Simplifying x = -1.303972465

Solution

The solution to the problem is based on the solutions from the subproblems. x = {13.803972465, -1.303972465}

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