x^2+35x-342=0

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Solution for x^2+35x-342=0 equation:


Simplifying
x2 + 35x + -342 = 0

Reorder the terms:
-342 + 35x + x2 = 0

Solving
-342 + 35x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '342' to each side of the equation.
-342 + 35x + 342 + x2 = 0 + 342

Reorder the terms:
-342 + 342 + 35x + x2 = 0 + 342

Combine like terms: -342 + 342 = 0
0 + 35x + x2 = 0 + 342
35x + x2 = 0 + 342

Combine like terms: 0 + 342 = 342
35x + x2 = 342

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 = 342 + 306.25

Reorder the terms:
306.25 + 35x + x2 = 342 + 306.25

Combine like terms: 342 + 306.25 = 648.25
306.25 + 35x + x2 = 648.25

Factor a perfect square on the left side:
(x + 17.5)(x + 17.5) = 648.25

Calculate the square root of the right side: 25.460754113

Break this problem into two subproblems by setting 
(x + 17.5) equal to 25.460754113 and -25.460754113.

Subproblem 1

x + 17.5 = 25.460754113 Simplifying x + 17.5 = 25.460754113 Reorder the terms: 17.5 + x = 25.460754113 Solving 17.5 + x = 25.460754113 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 = 25.460754113 + -17.5 Combine like terms: 17.5 + -17.5 = 0.0 0.0 + x = 25.460754113 + -17.5 x = 25.460754113 + -17.5 Combine like terms: 25.460754113 + -17.5 = 7.960754113 x = 7.960754113 Simplifying x = 7.960754113

Subproblem 2

x + 17.5 = -25.460754113 Simplifying x + 17.5 = -25.460754113 Reorder the terms: 17.5 + x = -25.460754113 Solving 17.5 + x = -25.460754113 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 = -25.460754113 + -17.5 Combine like terms: 17.5 + -17.5 = 0.0 0.0 + x = -25.460754113 + -17.5 x = -25.460754113 + -17.5 Combine like terms: -25.460754113 + -17.5 = -42.960754113 x = -42.960754113 Simplifying x = -42.960754113

Solution

The solution to the problem is based on the solutions from the subproblems. x = {7.960754113, -42.960754113}

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