2x^2+28x-507=0

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Solution for 2x^2+28x-507=0 equation:


Simplifying
2x2 + 28x + -507 = 0

Reorder the terms:
-507 + 28x + 2x2 = 0

Solving
-507 + 28x + 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'.
-253.5 + 14x + x2 = 0

Move the constant term to the right:

Add '253.5' to each side of the equation.
-253.5 + 14x + 253.5 + x2 = 0 + 253.5

Reorder the terms:
-253.5 + 253.5 + 14x + x2 = 0 + 253.5

Combine like terms: -253.5 + 253.5 = 0.0
0.0 + 14x + x2 = 0 + 253.5
14x + x2 = 0 + 253.5

Combine like terms: 0 + 253.5 = 253.5
14x + x2 = 253.5

The x term is 14x.  Take half its coefficient (7).
Square it (49) and add it to both sides.

Add '49' to each side of the equation.
14x + 49 + x2 = 253.5 + 49

Reorder the terms:
49 + 14x + x2 = 253.5 + 49

Combine like terms: 253.5 + 49 = 302.5
49 + 14x + x2 = 302.5

Factor a perfect square on the left side:
(x + 7)(x + 7) = 302.5

Calculate the square root of the right side: 17.392527131

Break this problem into two subproblems by setting 
(x + 7) equal to 17.392527131 and -17.392527131.

Subproblem 1

x + 7 = 17.392527131 Simplifying x + 7 = 17.392527131 Reorder the terms: 7 + x = 17.392527131 Solving 7 + x = 17.392527131 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + x = 17.392527131 + -7 Combine like terms: 7 + -7 = 0 0 + x = 17.392527131 + -7 x = 17.392527131 + -7 Combine like terms: 17.392527131 + -7 = 10.392527131 x = 10.392527131 Simplifying x = 10.392527131

Subproblem 2

x + 7 = -17.392527131 Simplifying x + 7 = -17.392527131 Reorder the terms: 7 + x = -17.392527131 Solving 7 + x = -17.392527131 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + x = -17.392527131 + -7 Combine like terms: 7 + -7 = 0 0 + x = -17.392527131 + -7 x = -17.392527131 + -7 Combine like terms: -17.392527131 + -7 = -24.392527131 x = -24.392527131 Simplifying x = -24.392527131

Solution

The solution to the problem is based on the solutions from the subproblems. x = {10.392527131, -24.392527131}

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