2x^2+10x-35=0

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Solution for 2x^2+10x-35=0 equation:


Simplifying
2x2 + 10x + -35 = 0

Reorder the terms:
-35 + 10x + 2x2 = 0

Solving
-35 + 10x + 2x2 = 0

Solving for variable 'x'.

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

Divide each side by '2'.
-17.5 + 5x + x2 = 0

Move the constant term to the right:

Add '17.5' to each side of the equation.
-17.5 + 5x + 17.5 + x2 = 0 + 17.5

Reorder the terms:
-17.5 + 17.5 + 5x + x2 = 0 + 17.5

Combine like terms: -17.5 + 17.5 = 0.0
0.0 + 5x + x2 = 0 + 17.5
5x + x2 = 0 + 17.5

Combine like terms: 0 + 17.5 = 17.5
5x + x2 = 17.5

The x term is 5x.  Take half its coefficient (2.5).
Square it (6.25) and add it to both sides.

Add '6.25' to each side of the equation.
5x + 6.25 + x2 = 17.5 + 6.25

Reorder the terms:
6.25 + 5x + x2 = 17.5 + 6.25

Combine like terms: 17.5 + 6.25 = 23.75
6.25 + 5x + x2 = 23.75

Factor a perfect square on the left side:
(x + 2.5)(x + 2.5) = 23.75

Calculate the square root of the right side: 4.873397172

Break this problem into two subproblems by setting 
(x + 2.5) equal to 4.873397172 and -4.873397172.

Subproblem 1

x + 2.5 = 4.873397172 Simplifying x + 2.5 = 4.873397172 Reorder the terms: 2.5 + x = 4.873397172 Solving 2.5 + x = 4.873397172 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + x = 4.873397172 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + x = 4.873397172 + -2.5 x = 4.873397172 + -2.5 Combine like terms: 4.873397172 + -2.5 = 2.373397172 x = 2.373397172 Simplifying x = 2.373397172

Subproblem 2

x + 2.5 = -4.873397172 Simplifying x + 2.5 = -4.873397172 Reorder the terms: 2.5 + x = -4.873397172 Solving 2.5 + x = -4.873397172 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + x = -4.873397172 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + x = -4.873397172 + -2.5 x = -4.873397172 + -2.5 Combine like terms: -4.873397172 + -2.5 = -7.373397172 x = -7.373397172 Simplifying x = -7.373397172

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.373397172, -7.373397172}

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