2x^2-3x-22=0

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Solution for 2x^2-3x-22=0 equation:


Simplifying
2x2 + -3x + -22 = 0

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

Solving
-22 + -3x + 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'.
-11 + -1.5x + x2 = 0

Move the constant term to the right:

Add '11' to each side of the equation.
-11 + -1.5x + 11 + x2 = 0 + 11

Reorder the terms:
-11 + 11 + -1.5x + x2 = 0 + 11

Combine like terms: -11 + 11 = 0
0 + -1.5x + x2 = 0 + 11
-1.5x + x2 = 0 + 11

Combine like terms: 0 + 11 = 11
-1.5x + x2 = 11

The x term is -1.5x.  Take half its coefficient (-0.75).
Square it (0.5625) and add it to both sides.

Add '0.5625' to each side of the equation.
-1.5x + 0.5625 + x2 = 11 + 0.5625

Reorder the terms:
0.5625 + -1.5x + x2 = 11 + 0.5625

Combine like terms: 11 + 0.5625 = 11.5625
0.5625 + -1.5x + x2 = 11.5625

Factor a perfect square on the left side:
(x + -0.75)(x + -0.75) = 11.5625

Calculate the square root of the right side: 3.400367627

Break this problem into two subproblems by setting 
(x + -0.75) equal to 3.400367627 and -3.400367627.

Subproblem 1

x + -0.75 = 3.400367627 Simplifying x + -0.75 = 3.400367627 Reorder the terms: -0.75 + x = 3.400367627 Solving -0.75 + x = 3.400367627 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.75' to each side of the equation. -0.75 + 0.75 + x = 3.400367627 + 0.75 Combine like terms: -0.75 + 0.75 = 0.00 0.00 + x = 3.400367627 + 0.75 x = 3.400367627 + 0.75 Combine like terms: 3.400367627 + 0.75 = 4.150367627 x = 4.150367627 Simplifying x = 4.150367627

Subproblem 2

x + -0.75 = -3.400367627 Simplifying x + -0.75 = -3.400367627 Reorder the terms: -0.75 + x = -3.400367627 Solving -0.75 + x = -3.400367627 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.75' to each side of the equation. -0.75 + 0.75 + x = -3.400367627 + 0.75 Combine like terms: -0.75 + 0.75 = 0.00 0.00 + x = -3.400367627 + 0.75 x = -3.400367627 + 0.75 Combine like terms: -3.400367627 + 0.75 = -2.650367627 x = -2.650367627 Simplifying x = -2.650367627

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.150367627, -2.650367627}

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