7x^2-5x-50=0

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Solution for 7x^2-5x-50=0 equation:


Simplifying
7x2 + -5x + -50 = 0

Reorder the terms:
-50 + -5x + 7x2 = 0

Solving
-50 + -5x + 7x2 = 0

Solving for variable 'x'.

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

Divide each side by '7'.
-7.142857143 + -0.7142857143x + x2 = 0

Move the constant term to the right:

Add '7.142857143' to each side of the equation.
-7.142857143 + -0.7142857143x + 7.142857143 + x2 = 0 + 7.142857143

Reorder the terms:
-7.142857143 + 7.142857143 + -0.7142857143x + x2 = 0 + 7.142857143

Combine like terms: -7.142857143 + 7.142857143 = 0.000000000
0.000000000 + -0.7142857143x + x2 = 0 + 7.142857143
-0.7142857143x + x2 = 0 + 7.142857143

Combine like terms: 0 + 7.142857143 = 7.142857143
-0.7142857143x + x2 = 7.142857143

The x term is -0.7142857143x.  Take half its coefficient (-0.3571428572).
Square it (0.1275510204) and add it to both sides.

Add '0.1275510204' to each side of the equation.
-0.7142857143x + 0.1275510204 + x2 = 7.142857143 + 0.1275510204

Reorder the terms:
0.1275510204 + -0.7142857143x + x2 = 7.142857143 + 0.1275510204

Combine like terms: 7.142857143 + 0.1275510204 = 7.2704081634
0.1275510204 + -0.7142857143x + x2 = 7.2704081634

Factor a perfect square on the left side:
(x + -0.3571428572)(x + -0.3571428572) = 7.2704081634

Calculate the square root of the right side: 2.696369441

Break this problem into two subproblems by setting 
(x + -0.3571428572) equal to 2.696369441 and -2.696369441.

Subproblem 1

x + -0.3571428572 = 2.696369441 Simplifying x + -0.3571428572 = 2.696369441 Reorder the terms: -0.3571428572 + x = 2.696369441 Solving -0.3571428572 + x = 2.696369441 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.3571428572' to each side of the equation. -0.3571428572 + 0.3571428572 + x = 2.696369441 + 0.3571428572 Combine like terms: -0.3571428572 + 0.3571428572 = 0.0000000000 0.0000000000 + x = 2.696369441 + 0.3571428572 x = 2.696369441 + 0.3571428572 Combine like terms: 2.696369441 + 0.3571428572 = 3.0535122982 x = 3.0535122982 Simplifying x = 3.0535122982

Subproblem 2

x + -0.3571428572 = -2.696369441 Simplifying x + -0.3571428572 = -2.696369441 Reorder the terms: -0.3571428572 + x = -2.696369441 Solving -0.3571428572 + x = -2.696369441 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.3571428572' to each side of the equation. -0.3571428572 + 0.3571428572 + x = -2.696369441 + 0.3571428572 Combine like terms: -0.3571428572 + 0.3571428572 = 0.0000000000 0.0000000000 + x = -2.696369441 + 0.3571428572 x = -2.696369441 + 0.3571428572 Combine like terms: -2.696369441 + 0.3571428572 = -2.3392265838 x = -2.3392265838 Simplifying x = -2.3392265838

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.0535122982, -2.3392265838}

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