4x^2+340x-169=

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Solution for 4x^2+340x-169= equation:


Simplifying
4x2 + 340x + -169 = 0

Reorder the terms:
-169 + 340x + 4x2 = 0

Solving
-169 + 340x + 4x2 = 0

Solving for variable 'x'.

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

Divide each side by '4'.
-42.25 + 85x + x2 = 0

Move the constant term to the right:

Add '42.25' to each side of the equation.
-42.25 + 85x + 42.25 + x2 = 0 + 42.25

Reorder the terms:
-42.25 + 42.25 + 85x + x2 = 0 + 42.25

Combine like terms: -42.25 + 42.25 = 0.00
0.00 + 85x + x2 = 0 + 42.25
85x + x2 = 0 + 42.25

Combine like terms: 0 + 42.25 = 42.25
85x + x2 = 42.25

The x term is 85x.  Take half its coefficient (42.5).
Square it (1806.25) and add it to both sides.

Add '1806.25' to each side of the equation.
85x + 1806.25 + x2 = 42.25 + 1806.25

Reorder the terms:
1806.25 + 85x + x2 = 42.25 + 1806.25

Combine like terms: 42.25 + 1806.25 = 1848.5
1806.25 + 85x + x2 = 1848.5

Factor a perfect square on the left side:
(x + 42.5)(x + 42.5) = 1848.5

Calculate the square root of the right side: 42.994185653

Break this problem into two subproblems by setting 
(x + 42.5) equal to 42.994185653 and -42.994185653.

Subproblem 1

x + 42.5 = 42.994185653 Simplifying x + 42.5 = 42.994185653 Reorder the terms: 42.5 + x = 42.994185653 Solving 42.5 + x = 42.994185653 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-42.5' to each side of the equation. 42.5 + -42.5 + x = 42.994185653 + -42.5 Combine like terms: 42.5 + -42.5 = 0.0 0.0 + x = 42.994185653 + -42.5 x = 42.994185653 + -42.5 Combine like terms: 42.994185653 + -42.5 = 0.494185653 x = 0.494185653 Simplifying x = 0.494185653

Subproblem 2

x + 42.5 = -42.994185653 Simplifying x + 42.5 = -42.994185653 Reorder the terms: 42.5 + x = -42.994185653 Solving 42.5 + x = -42.994185653 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-42.5' to each side of the equation. 42.5 + -42.5 + x = -42.994185653 + -42.5 Combine like terms: 42.5 + -42.5 = 0.0 0.0 + x = -42.994185653 + -42.5 x = -42.994185653 + -42.5 Combine like terms: -42.994185653 + -42.5 = -85.494185653 x = -85.494185653 Simplifying x = -85.494185653

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.494185653, -85.494185653}

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