5x^2+35x=1

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Solution for 5x^2+35x=1 equation:


Simplifying
5x2 + 35x = 1

Reorder the terms:
35x + 5x2 = 1

Solving
35x + 5x2 = 1

Solving for variable 'x'.

Reorder the terms:
-1 + 35x + 5x2 = 1 + -1

Combine like terms: 1 + -1 = 0
-1 + 35x + 5x2 = 0

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

Divide each side by '5'.
-0.2 + 7x + x2 = 0

Move the constant term to the right:

Add '0.2' to each side of the equation.
-0.2 + 7x + 0.2 + x2 = 0 + 0.2

Reorder the terms:
-0.2 + 0.2 + 7x + x2 = 0 + 0.2

Combine like terms: -0.2 + 0.2 = 0.0
0.0 + 7x + x2 = 0 + 0.2
7x + x2 = 0 + 0.2

Combine like terms: 0 + 0.2 = 0.2
7x + x2 = 0.2

The x term is 7x.  Take half its coefficient (3.5).
Square it (12.25) and add it to both sides.

Add '12.25' to each side of the equation.
7x + 12.25 + x2 = 0.2 + 12.25

Reorder the terms:
12.25 + 7x + x2 = 0.2 + 12.25

Combine like terms: 0.2 + 12.25 = 12.45
12.25 + 7x + x2 = 12.45

Factor a perfect square on the left side:
(x + 3.5)(x + 3.5) = 12.45

Calculate the square root of the right side: 3.528455753

Break this problem into two subproblems by setting 
(x + 3.5) equal to 3.528455753 and -3.528455753.

Subproblem 1

x + 3.5 = 3.528455753 Simplifying x + 3.5 = 3.528455753 Reorder the terms: 3.5 + x = 3.528455753 Solving 3.5 + x = 3.528455753 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.5' to each side of the equation. 3.5 + -3.5 + x = 3.528455753 + -3.5 Combine like terms: 3.5 + -3.5 = 0.0 0.0 + x = 3.528455753 + -3.5 x = 3.528455753 + -3.5 Combine like terms: 3.528455753 + -3.5 = 0.028455753 x = 0.028455753 Simplifying x = 0.028455753

Subproblem 2

x + 3.5 = -3.528455753 Simplifying x + 3.5 = -3.528455753 Reorder the terms: 3.5 + x = -3.528455753 Solving 3.5 + x = -3.528455753 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.5' to each side of the equation. 3.5 + -3.5 + x = -3.528455753 + -3.5 Combine like terms: 3.5 + -3.5 = 0.0 0.0 + x = -3.528455753 + -3.5 x = -3.528455753 + -3.5 Combine like terms: -3.528455753 + -3.5 = -7.028455753 x = -7.028455753 Simplifying x = -7.028455753

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.028455753, -7.028455753}

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