x^2+56x-510=0

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Solution for x^2+56x-510=0 equation:


Simplifying
x2 + 56x + -510 = 0

Reorder the terms:
-510 + 56x + x2 = 0

Solving
-510 + 56x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '510' to each side of the equation.
-510 + 56x + 510 + x2 = 0 + 510

Reorder the terms:
-510 + 510 + 56x + x2 = 0 + 510

Combine like terms: -510 + 510 = 0
0 + 56x + x2 = 0 + 510
56x + x2 = 0 + 510

Combine like terms: 0 + 510 = 510
56x + x2 = 510

The x term is 56x.  Take half its coefficient (28).
Square it (784) and add it to both sides.

Add '784' to each side of the equation.
56x + 784 + x2 = 510 + 784

Reorder the terms:
784 + 56x + x2 = 510 + 784

Combine like terms: 510 + 784 = 1294
784 + 56x + x2 = 1294

Factor a perfect square on the left side:
(x + 28)(x + 28) = 1294

Calculate the square root of the right side: 35.972211497

Break this problem into two subproblems by setting 
(x + 28) equal to 35.972211497 and -35.972211497.

Subproblem 1

x + 28 = 35.972211497 Simplifying x + 28 = 35.972211497 Reorder the terms: 28 + x = 35.972211497 Solving 28 + x = 35.972211497 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-28' to each side of the equation. 28 + -28 + x = 35.972211497 + -28 Combine like terms: 28 + -28 = 0 0 + x = 35.972211497 + -28 x = 35.972211497 + -28 Combine like terms: 35.972211497 + -28 = 7.972211497 x = 7.972211497 Simplifying x = 7.972211497

Subproblem 2

x + 28 = -35.972211497 Simplifying x + 28 = -35.972211497 Reorder the terms: 28 + x = -35.972211497 Solving 28 + x = -35.972211497 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-28' to each side of the equation. 28 + -28 + x = -35.972211497 + -28 Combine like terms: 28 + -28 = 0 0 + x = -35.972211497 + -28 x = -35.972211497 + -28 Combine like terms: -35.972211497 + -28 = -63.972211497 x = -63.972211497 Simplifying x = -63.972211497

Solution

The solution to the problem is based on the solutions from the subproblems. x = {7.972211497, -63.972211497}

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