5x^2-3x-222=0

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Solution for 5x^2-3x-222=0 equation:


Simplifying
5x2 + -3x + -222 = 0

Reorder the terms:
-222 + -3x + 5x2 = 0

Solving
-222 + -3x + 5x2 = 0

Solving for variable 'x'.

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

Divide each side by '5'.
-44.4 + -0.6x + x2 = 0

Move the constant term to the right:

Add '44.4' to each side of the equation.
-44.4 + -0.6x + 44.4 + x2 = 0 + 44.4

Reorder the terms:
-44.4 + 44.4 + -0.6x + x2 = 0 + 44.4

Combine like terms: -44.4 + 44.4 = 0.0
0.0 + -0.6x + x2 = 0 + 44.4
-0.6x + x2 = 0 + 44.4

Combine like terms: 0 + 44.4 = 44.4
-0.6x + x2 = 44.4

The x term is -0.6x.  Take half its coefficient (-0.3).
Square it (0.09) and add it to both sides.

Add '0.09' to each side of the equation.
-0.6x + 0.09 + x2 = 44.4 + 0.09

Reorder the terms:
0.09 + -0.6x + x2 = 44.4 + 0.09

Combine like terms: 44.4 + 0.09 = 44.49
0.09 + -0.6x + x2 = 44.49

Factor a perfect square on the left side:
(x + -0.3)(x + -0.3) = 44.49

Calculate the square root of the right side: 6.670082458

Break this problem into two subproblems by setting 
(x + -0.3) equal to 6.670082458 and -6.670082458.

Subproblem 1

x + -0.3 = 6.670082458 Simplifying x + -0.3 = 6.670082458 Reorder the terms: -0.3 + x = 6.670082458 Solving -0.3 + x = 6.670082458 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.3' to each side of the equation. -0.3 + 0.3 + x = 6.670082458 + 0.3 Combine like terms: -0.3 + 0.3 = 0.0 0.0 + x = 6.670082458 + 0.3 x = 6.670082458 + 0.3 Combine like terms: 6.670082458 + 0.3 = 6.970082458 x = 6.970082458 Simplifying x = 6.970082458

Subproblem 2

x + -0.3 = -6.670082458 Simplifying x + -0.3 = -6.670082458 Reorder the terms: -0.3 + x = -6.670082458 Solving -0.3 + x = -6.670082458 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.3' to each side of the equation. -0.3 + 0.3 + x = -6.670082458 + 0.3 Combine like terms: -0.3 + 0.3 = 0.0 0.0 + x = -6.670082458 + 0.3 x = -6.670082458 + 0.3 Combine like terms: -6.670082458 + 0.3 = -6.370082458 x = -6.370082458 Simplifying x = -6.370082458

Solution

The solution to the problem is based on the solutions from the subproblems. x = {6.970082458, -6.370082458}

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