5x^2-35x=4

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Solution for 5x^2-35x=4 equation:


Simplifying
5x2 + -35x = 4

Reorder the terms:
-35x + 5x2 = 4

Solving
-35x + 5x2 = 4

Solving for variable 'x'.

Reorder the terms:
-4 + -35x + 5x2 = 4 + -4

Combine like terms: 4 + -4 = 0
-4 + -35x + 5x2 = 0

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

Divide each side by '5'.
-0.8 + -7x + x2 = 0

Move the constant term to the right:

Add '0.8' to each side of the equation.
-0.8 + -7x + 0.8 + x2 = 0 + 0.8

Reorder the terms:
-0.8 + 0.8 + -7x + x2 = 0 + 0.8

Combine like terms: -0.8 + 0.8 = 0.0
0.0 + -7x + x2 = 0 + 0.8
-7x + x2 = 0 + 0.8

Combine like terms: 0 + 0.8 = 0.8
-7x + x2 = 0.8

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 = 0.8 + 12.25

Reorder the terms:
12.25 + -7x + x2 = 0.8 + 12.25

Combine like terms: 0.8 + 12.25 = 13.05
12.25 + -7x + x2 = 13.05

Factor a perfect square on the left side:
(x + -3.5)(x + -3.5) = 13.05

Calculate the square root of the right side: 3.612478374

Break this problem into two subproblems by setting 
(x + -3.5) equal to 3.612478374 and -3.612478374.

Subproblem 1

x + -3.5 = 3.612478374 Simplifying x + -3.5 = 3.612478374 Reorder the terms: -3.5 + x = 3.612478374 Solving -3.5 + x = 3.612478374 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 = 3.612478374 + 3.5 Combine like terms: -3.5 + 3.5 = 0.0 0.0 + x = 3.612478374 + 3.5 x = 3.612478374 + 3.5 Combine like terms: 3.612478374 + 3.5 = 7.112478374 x = 7.112478374 Simplifying x = 7.112478374

Subproblem 2

x + -3.5 = -3.612478374 Simplifying x + -3.5 = -3.612478374 Reorder the terms: -3.5 + x = -3.612478374 Solving -3.5 + x = -3.612478374 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 = -3.612478374 + 3.5 Combine like terms: -3.5 + 3.5 = 0.0 0.0 + x = -3.612478374 + 3.5 x = -3.612478374 + 3.5 Combine like terms: -3.612478374 + 3.5 = -0.112478374 x = -0.112478374 Simplifying x = -0.112478374

Solution

The solution to the problem is based on the solutions from the subproblems. x = {7.112478374, -0.112478374}

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