10x^2+23x-36=0

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Solution for 10x^2+23x-36=0 equation:


Simplifying
10x2 + 23x + -36 = 0

Reorder the terms:
-36 + 23x + 10x2 = 0

Solving
-36 + 23x + 10x2 = 0

Solving for variable 'x'.

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

Divide each side by '10'.
-3.6 + 2.3x + x2 = 0

Move the constant term to the right:

Add '3.6' to each side of the equation.
-3.6 + 2.3x + 3.6 + x2 = 0 + 3.6

Reorder the terms:
-3.6 + 3.6 + 2.3x + x2 = 0 + 3.6

Combine like terms: -3.6 + 3.6 = 0.0
0.0 + 2.3x + x2 = 0 + 3.6
2.3x + x2 = 0 + 3.6

Combine like terms: 0 + 3.6 = 3.6
2.3x + x2 = 3.6

The x term is 2.3x.  Take half its coefficient (1.15).
Square it (1.3225) and add it to both sides.

Add '1.3225' to each side of the equation.
2.3x + 1.3225 + x2 = 3.6 + 1.3225

Reorder the terms:
1.3225 + 2.3x + x2 = 3.6 + 1.3225

Combine like terms: 3.6 + 1.3225 = 4.9225
1.3225 + 2.3x + x2 = 4.9225

Factor a perfect square on the left side:
(x + 1.15)(x + 1.15) = 4.9225

Calculate the square root of the right side: 2.218670773

Break this problem into two subproblems by setting 
(x + 1.15) equal to 2.218670773 and -2.218670773.

Subproblem 1

x + 1.15 = 2.218670773 Simplifying x + 1.15 = 2.218670773 Reorder the terms: 1.15 + x = 2.218670773 Solving 1.15 + x = 2.218670773 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.15' to each side of the equation. 1.15 + -1.15 + x = 2.218670773 + -1.15 Combine like terms: 1.15 + -1.15 = 0.00 0.00 + x = 2.218670773 + -1.15 x = 2.218670773 + -1.15 Combine like terms: 2.218670773 + -1.15 = 1.068670773 x = 1.068670773 Simplifying x = 1.068670773

Subproblem 2

x + 1.15 = -2.218670773 Simplifying x + 1.15 = -2.218670773 Reorder the terms: 1.15 + x = -2.218670773 Solving 1.15 + x = -2.218670773 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.15' to each side of the equation. 1.15 + -1.15 + x = -2.218670773 + -1.15 Combine like terms: 1.15 + -1.15 = 0.00 0.00 + x = -2.218670773 + -1.15 x = -2.218670773 + -1.15 Combine like terms: -2.218670773 + -1.15 = -3.368670773 x = -3.368670773 Simplifying x = -3.368670773

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.068670773, -3.368670773}

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