0.7x^2=104x+0.7

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Solution for 0.7x^2=104x+0.7 equation:


Simplifying
0.7x2 = 104x + 0.7

Reorder the terms:
0.7x2 = 0.7 + 104x

Solving
0.7x2 = 0.7 + 104x

Solving for variable 'x'.

Reorder the terms:
-0.7 + -104x + 0.7x2 = 0.7 + 104x + -0.7 + -104x

Reorder the terms:
-0.7 + -104x + 0.7x2 = 0.7 + -0.7 + 104x + -104x

Combine like terms: 0.7 + -0.7 = 0.0
-0.7 + -104x + 0.7x2 = 0.0 + 104x + -104x
-0.7 + -104x + 0.7x2 = 104x + -104x

Combine like terms: 104x + -104x = 0
-0.7 + -104x + 0.7x2 = 0

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

Divide each side by '0.7'.
-1 + -148.5714286x + x2 = 0

Move the constant term to the right:

Add '1' to each side of the equation.
-1 + -148.5714286x + 1 + x2 = 0 + 1

Reorder the terms:
-1 + 1 + -148.5714286x + x2 = 0 + 1

Combine like terms: -1 + 1 = 0
0 + -148.5714286x + x2 = 0 + 1
-148.5714286x + x2 = 0 + 1

Combine like terms: 0 + 1 = 1
-148.5714286x + x2 = 1

The x term is -148.5714286x.  Take half its coefficient (-74.2857143).
Square it (5518.367349) and add it to both sides.

Add '5518.367349' to each side of the equation.
-148.5714286x + 5518.367349 + x2 = 1 + 5518.367349

Reorder the terms:
5518.367349 + -148.5714286x + x2 = 1 + 5518.367349

Combine like terms: 1 + 5518.367349 = 5519.367349
5518.367349 + -148.5714286x + x2 = 5519.367349

Factor a perfect square on the left side:
(x + -74.2857143)(x + -74.2857143) = 5519.367349

Calculate the square root of the right side: 74.292444764

Break this problem into two subproblems by setting 
(x + -74.2857143) equal to 74.292444764 and -74.292444764.

Subproblem 1

x + -74.2857143 = 74.292444764 Simplifying x + -74.2857143 = 74.292444764 Reorder the terms: -74.2857143 + x = 74.292444764 Solving -74.2857143 + x = 74.292444764 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '74.2857143' to each side of the equation. -74.2857143 + 74.2857143 + x = 74.292444764 + 74.2857143 Combine like terms: -74.2857143 + 74.2857143 = 0.0000000 0.0000000 + x = 74.292444764 + 74.2857143 x = 74.292444764 + 74.2857143 Combine like terms: 74.292444764 + 74.2857143 = 148.578159064 x = 148.578159064 Simplifying x = 148.578159064

Subproblem 2

x + -74.2857143 = -74.292444764 Simplifying x + -74.2857143 = -74.292444764 Reorder the terms: -74.2857143 + x = -74.292444764 Solving -74.2857143 + x = -74.292444764 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '74.2857143' to each side of the equation. -74.2857143 + 74.2857143 + x = -74.292444764 + 74.2857143 Combine like terms: -74.2857143 + 74.2857143 = 0.0000000 0.0000000 + x = -74.292444764 + 74.2857143 x = -74.292444764 + 74.2857143 Combine like terms: -74.292444764 + 74.2857143 = -0.006730464 x = -0.006730464 Simplifying x = -0.006730464

Solution

The solution to the problem is based on the solutions from the subproblems. x = {148.578159064, -0.006730464}

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