2x^2-70x=17

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Solution for 2x^2-70x=17 equation:


Simplifying
2x2 + -70x = 17

Reorder the terms:
-70x + 2x2 = 17

Solving
-70x + 2x2 = 17

Solving for variable 'x'.

Reorder the terms:
-17 + -70x + 2x2 = 17 + -17

Combine like terms: 17 + -17 = 0
-17 + -70x + 2x2 = 0

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

Divide each side by '2'.
-8.5 + -35x + x2 = 0

Move the constant term to the right:

Add '8.5' to each side of the equation.
-8.5 + -35x + 8.5 + x2 = 0 + 8.5

Reorder the terms:
-8.5 + 8.5 + -35x + x2 = 0 + 8.5

Combine like terms: -8.5 + 8.5 = 0.0
0.0 + -35x + x2 = 0 + 8.5
-35x + x2 = 0 + 8.5

Combine like terms: 0 + 8.5 = 8.5
-35x + x2 = 8.5

The x term is -35x.  Take half its coefficient (-17.5).
Square it (306.25) and add it to both sides.

Add '306.25' to each side of the equation.
-35x + 306.25 + x2 = 8.5 + 306.25

Reorder the terms:
306.25 + -35x + x2 = 8.5 + 306.25

Combine like terms: 8.5 + 306.25 = 314.75
306.25 + -35x + x2 = 314.75

Factor a perfect square on the left side:
(x + -17.5)(x + -17.5) = 314.75

Calculate the square root of the right side: 17.741194999

Break this problem into two subproblems by setting 
(x + -17.5) equal to 17.741194999 and -17.741194999.

Subproblem 1

x + -17.5 = 17.741194999 Simplifying x + -17.5 = 17.741194999 Reorder the terms: -17.5 + x = 17.741194999 Solving -17.5 + x = 17.741194999 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '17.5' to each side of the equation. -17.5 + 17.5 + x = 17.741194999 + 17.5 Combine like terms: -17.5 + 17.5 = 0.0 0.0 + x = 17.741194999 + 17.5 x = 17.741194999 + 17.5 Combine like terms: 17.741194999 + 17.5 = 35.241194999 x = 35.241194999 Simplifying x = 35.241194999

Subproblem 2

x + -17.5 = -17.741194999 Simplifying x + -17.5 = -17.741194999 Reorder the terms: -17.5 + x = -17.741194999 Solving -17.5 + x = -17.741194999 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '17.5' to each side of the equation. -17.5 + 17.5 + x = -17.741194999 + 17.5 Combine like terms: -17.5 + 17.5 = 0.0 0.0 + x = -17.741194999 + 17.5 x = -17.741194999 + 17.5 Combine like terms: -17.741194999 + 17.5 = -0.241194999 x = -0.241194999 Simplifying x = -0.241194999

Solution

The solution to the problem is based on the solutions from the subproblems. x = {35.241194999, -0.241194999}

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