x^2+10x-76=0

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Solution for x^2+10x-76=0 equation:


Simplifying
x2 + 10x + -76 = 0

Reorder the terms:
-76 + 10x + x2 = 0

Solving
-76 + 10x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '76' to each side of the equation.
-76 + 10x + 76 + x2 = 0 + 76

Reorder the terms:
-76 + 76 + 10x + x2 = 0 + 76

Combine like terms: -76 + 76 = 0
0 + 10x + x2 = 0 + 76
10x + x2 = 0 + 76

Combine like terms: 0 + 76 = 76
10x + x2 = 76

The x term is 10x.  Take half its coefficient (5).
Square it (25) and add it to both sides.

Add '25' to each side of the equation.
10x + 25 + x2 = 76 + 25

Reorder the terms:
25 + 10x + x2 = 76 + 25

Combine like terms: 76 + 25 = 101
25 + 10x + x2 = 101

Factor a perfect square on the left side:
(x + 5)(x + 5) = 101

Calculate the square root of the right side: 10.049875621

Break this problem into two subproblems by setting 
(x + 5) equal to 10.049875621 and -10.049875621.

Subproblem 1

x + 5 = 10.049875621 Simplifying x + 5 = 10.049875621 Reorder the terms: 5 + x = 10.049875621 Solving 5 + x = 10.049875621 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + x = 10.049875621 + -5 Combine like terms: 5 + -5 = 0 0 + x = 10.049875621 + -5 x = 10.049875621 + -5 Combine like terms: 10.049875621 + -5 = 5.049875621 x = 5.049875621 Simplifying x = 5.049875621

Subproblem 2

x + 5 = -10.049875621 Simplifying x + 5 = -10.049875621 Reorder the terms: 5 + x = -10.049875621 Solving 5 + x = -10.049875621 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + x = -10.049875621 + -5 Combine like terms: 5 + -5 = 0 0 + x = -10.049875621 + -5 x = -10.049875621 + -5 Combine like terms: -10.049875621 + -5 = -15.049875621 x = -15.049875621 Simplifying x = -15.049875621

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.049875621, -15.049875621}

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