10x^2-21x-50=0

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Solution for 10x^2-21x-50=0 equation:


Simplifying
10x2 + -21x + -50 = 0

Reorder the terms:
-50 + -21x + 10x2 = 0

Solving
-50 + -21x + 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'.
-5 + -2.1x + x2 = 0

Move the constant term to the right:

Add '5' to each side of the equation.
-5 + -2.1x + 5 + x2 = 0 + 5

Reorder the terms:
-5 + 5 + -2.1x + x2 = 0 + 5

Combine like terms: -5 + 5 = 0
0 + -2.1x + x2 = 0 + 5
-2.1x + x2 = 0 + 5

Combine like terms: 0 + 5 = 5
-2.1x + x2 = 5

The x term is -2.1x.  Take half its coefficient (-1.05).
Square it (1.1025) and add it to both sides.

Add '1.1025' to each side of the equation.
-2.1x + 1.1025 + x2 = 5 + 1.1025

Reorder the terms:
1.1025 + -2.1x + x2 = 5 + 1.1025

Combine like terms: 5 + 1.1025 = 6.1025
1.1025 + -2.1x + x2 = 6.1025

Factor a perfect square on the left side:
(x + -1.05)(x + -1.05) = 6.1025

Calculate the square root of the right side: 2.470323865

Break this problem into two subproblems by setting 
(x + -1.05) equal to 2.470323865 and -2.470323865.

Subproblem 1

x + -1.05 = 2.470323865 Simplifying x + -1.05 = 2.470323865 Reorder the terms: -1.05 + x = 2.470323865 Solving -1.05 + x = 2.470323865 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.05' to each side of the equation. -1.05 + 1.05 + x = 2.470323865 + 1.05 Combine like terms: -1.05 + 1.05 = 0.00 0.00 + x = 2.470323865 + 1.05 x = 2.470323865 + 1.05 Combine like terms: 2.470323865 + 1.05 = 3.520323865 x = 3.520323865 Simplifying x = 3.520323865

Subproblem 2

x + -1.05 = -2.470323865 Simplifying x + -1.05 = -2.470323865 Reorder the terms: -1.05 + x = -2.470323865 Solving -1.05 + x = -2.470323865 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.05' to each side of the equation. -1.05 + 1.05 + x = -2.470323865 + 1.05 Combine like terms: -1.05 + 1.05 = 0.00 0.00 + x = -2.470323865 + 1.05 x = -2.470323865 + 1.05 Combine like terms: -2.470323865 + 1.05 = -1.420323865 x = -1.420323865 Simplifying x = -1.420323865

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.520323865, -1.420323865}

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