10x^2-23x-7=0

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Solution for 10x^2-23x-7=0 equation:


Simplifying
10x2 + -23x + -7 = 0

Reorder the terms:
-7 + -23x + 10x2 = 0

Solving
-7 + -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'.
-0.7 + -2.3x + x2 = 0

Move the constant term to the right:

Add '0.7' to each side of the equation.
-0.7 + -2.3x + 0.7 + x2 = 0 + 0.7

Reorder the terms:
-0.7 + 0.7 + -2.3x + x2 = 0 + 0.7

Combine like terms: -0.7 + 0.7 = 0.0
0.0 + -2.3x + x2 = 0 + 0.7
-2.3x + x2 = 0 + 0.7

Combine like terms: 0 + 0.7 = 0.7
-2.3x + x2 = 0.7

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 = 0.7 + 1.3225

Reorder the terms:
1.3225 + -2.3x + x2 = 0.7 + 1.3225

Combine like terms: 0.7 + 1.3225 = 2.0225
1.3225 + -2.3x + x2 = 2.0225

Factor a perfect square on the left side:
(x + -1.15)(x + -1.15) = 2.0225

Calculate the square root of the right side: 1.422146265

Break this problem into two subproblems by setting 
(x + -1.15) equal to 1.422146265 and -1.422146265.

Subproblem 1

x + -1.15 = 1.422146265 Simplifying x + -1.15 = 1.422146265 Reorder the terms: -1.15 + x = 1.422146265 Solving -1.15 + x = 1.422146265 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 = 1.422146265 + 1.15 Combine like terms: -1.15 + 1.15 = 0.00 0.00 + x = 1.422146265 + 1.15 x = 1.422146265 + 1.15 Combine like terms: 1.422146265 + 1.15 = 2.572146265 x = 2.572146265 Simplifying x = 2.572146265

Subproblem 2

x + -1.15 = -1.422146265 Simplifying x + -1.15 = -1.422146265 Reorder the terms: -1.15 + x = -1.422146265 Solving -1.15 + x = -1.422146265 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 = -1.422146265 + 1.15 Combine like terms: -1.15 + 1.15 = 0.00 0.00 + x = -1.422146265 + 1.15 x = -1.422146265 + 1.15 Combine like terms: -1.422146265 + 1.15 = -0.272146265 x = -0.272146265 Simplifying x = -0.272146265

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.572146265, -0.272146265}

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