5x^2-87x+35=0

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Solution for 5x^2-87x+35=0 equation:


Simplifying
5x2 + -87x + 35 = 0

Reorder the terms:
35 + -87x + 5x2 = 0

Solving
35 + -87x + 5x2 = 0

Solving for variable 'x'.

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

Divide each side by '5'.
7 + -17.4x + x2 = 0

Move the constant term to the right:

Add '-7' to each side of the equation.
7 + -17.4x + -7 + x2 = 0 + -7

Reorder the terms:
7 + -7 + -17.4x + x2 = 0 + -7

Combine like terms: 7 + -7 = 0
0 + -17.4x + x2 = 0 + -7
-17.4x + x2 = 0 + -7

Combine like terms: 0 + -7 = -7
-17.4x + x2 = -7

The x term is -17.4x.  Take half its coefficient (-8.7).
Square it (75.69) and add it to both sides.

Add '75.69' to each side of the equation.
-17.4x + 75.69 + x2 = -7 + 75.69

Reorder the terms:
75.69 + -17.4x + x2 = -7 + 75.69

Combine like terms: -7 + 75.69 = 68.69
75.69 + -17.4x + x2 = 68.69

Factor a perfect square on the left side:
(x + -8.7)(x + -8.7) = 68.69

Calculate the square root of the right side: 8.28794305

Break this problem into two subproblems by setting 
(x + -8.7) equal to 8.28794305 and -8.28794305.

Subproblem 1

x + -8.7 = 8.28794305 Simplifying x + -8.7 = 8.28794305 Reorder the terms: -8.7 + x = 8.28794305 Solving -8.7 + x = 8.28794305 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '8.7' to each side of the equation. -8.7 + 8.7 + x = 8.28794305 + 8.7 Combine like terms: -8.7 + 8.7 = 0.0 0.0 + x = 8.28794305 + 8.7 x = 8.28794305 + 8.7 Combine like terms: 8.28794305 + 8.7 = 16.98794305 x = 16.98794305 Simplifying x = 16.98794305

Subproblem 2

x + -8.7 = -8.28794305 Simplifying x + -8.7 = -8.28794305 Reorder the terms: -8.7 + x = -8.28794305 Solving -8.7 + x = -8.28794305 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '8.7' to each side of the equation. -8.7 + 8.7 + x = -8.28794305 + 8.7 Combine like terms: -8.7 + 8.7 = 0.0 0.0 + x = -8.28794305 + 8.7 x = -8.28794305 + 8.7 Combine like terms: -8.28794305 + 8.7 = 0.41205695 x = 0.41205695 Simplifying x = 0.41205695

Solution

The solution to the problem is based on the solutions from the subproblems. x = {16.98794305, 0.41205695}

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