4x^2+36x-35=0

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Solution for 4x^2+36x-35=0 equation:


Simplifying
4x2 + 36x + -35 = 0

Reorder the terms:
-35 + 36x + 4x2 = 0

Solving
-35 + 36x + 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'.
-8.75 + 9x + x2 = 0

Move the constant term to the right:

Add '8.75' to each side of the equation.
-8.75 + 9x + 8.75 + x2 = 0 + 8.75

Reorder the terms:
-8.75 + 8.75 + 9x + x2 = 0 + 8.75

Combine like terms: -8.75 + 8.75 = 0.00
0.00 + 9x + x2 = 0 + 8.75
9x + x2 = 0 + 8.75

Combine like terms: 0 + 8.75 = 8.75
9x + x2 = 8.75

The x term is 9x.  Take half its coefficient (4.5).
Square it (20.25) and add it to both sides.

Add '20.25' to each side of the equation.
9x + 20.25 + x2 = 8.75 + 20.25

Reorder the terms:
20.25 + 9x + x2 = 8.75 + 20.25

Combine like terms: 8.75 + 20.25 = 29
20.25 + 9x + x2 = 29

Factor a perfect square on the left side:
(x + 4.5)(x + 4.5) = 29

Calculate the square root of the right side: 5.385164807

Break this problem into two subproblems by setting 
(x + 4.5) equal to 5.385164807 and -5.385164807.

Subproblem 1

x + 4.5 = 5.385164807 Simplifying x + 4.5 = 5.385164807 Reorder the terms: 4.5 + x = 5.385164807 Solving 4.5 + x = 5.385164807 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4.5' to each side of the equation. 4.5 + -4.5 + x = 5.385164807 + -4.5 Combine like terms: 4.5 + -4.5 = 0.0 0.0 + x = 5.385164807 + -4.5 x = 5.385164807 + -4.5 Combine like terms: 5.385164807 + -4.5 = 0.885164807 x = 0.885164807 Simplifying x = 0.885164807

Subproblem 2

x + 4.5 = -5.385164807 Simplifying x + 4.5 = -5.385164807 Reorder the terms: 4.5 + x = -5.385164807 Solving 4.5 + x = -5.385164807 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4.5' to each side of the equation. 4.5 + -4.5 + x = -5.385164807 + -4.5 Combine like terms: 4.5 + -4.5 = 0.0 0.0 + x = -5.385164807 + -4.5 x = -5.385164807 + -4.5 Combine like terms: -5.385164807 + -4.5 = -9.885164807 x = -9.885164807 Simplifying x = -9.885164807

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.885164807, -9.885164807}

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