100x^2-6x-1.2=0

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Solution for 100x^2-6x-1.2=0 equation:


Simplifying
100x2 + -6x + -1.2 = 0

Reorder the terms:
-1.2 + -6x + 100x2 = 0

Solving
-1.2 + -6x + 100x2 = 0

Solving for variable 'x'.

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

Divide each side by '100'.
-0.012 + -0.06x + x2 = 0

Move the constant term to the right:

Add '0.012' to each side of the equation.
-0.012 + -0.06x + 0.012 + x2 = 0 + 0.012

Reorder the terms:
-0.012 + 0.012 + -0.06x + x2 = 0 + 0.012

Combine like terms: -0.012 + 0.012 = 0.000
0.000 + -0.06x + x2 = 0 + 0.012
-0.06x + x2 = 0 + 0.012

Combine like terms: 0 + 0.012 = 0.012
-0.06x + x2 = 0.012

The x term is -0.06x.  Take half its coefficient (-0.03).
Square it (0.0009) and add it to both sides.

Add '0.0009' to each side of the equation.
-0.06x + 0.0009 + x2 = 0.012 + 0.0009

Reorder the terms:
0.0009 + -0.06x + x2 = 0.012 + 0.0009

Combine like terms: 0.012 + 0.0009 = 0.0129
0.0009 + -0.06x + x2 = 0.0129

Factor a perfect square on the left side:
(x + -0.03)(x + -0.03) = 0.0129

Calculate the square root of the right side: 0.113578167

Break this problem into two subproblems by setting 
(x + -0.03) equal to 0.113578167 and -0.113578167.

Subproblem 1

x + -0.03 = 0.113578167 Simplifying x + -0.03 = 0.113578167 Reorder the terms: -0.03 + x = 0.113578167 Solving -0.03 + x = 0.113578167 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.03' to each side of the equation. -0.03 + 0.03 + x = 0.113578167 + 0.03 Combine like terms: -0.03 + 0.03 = 0.00 0.00 + x = 0.113578167 + 0.03 x = 0.113578167 + 0.03 Combine like terms: 0.113578167 + 0.03 = 0.143578167 x = 0.143578167 Simplifying x = 0.143578167

Subproblem 2

x + -0.03 = -0.113578167 Simplifying x + -0.03 = -0.113578167 Reorder the terms: -0.03 + x = -0.113578167 Solving -0.03 + x = -0.113578167 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.03' to each side of the equation. -0.03 + 0.03 + x = -0.113578167 + 0.03 Combine like terms: -0.03 + 0.03 = 0.00 0.00 + x = -0.113578167 + 0.03 x = -0.113578167 + 0.03 Combine like terms: -0.113578167 + 0.03 = -0.083578167 x = -0.083578167 Simplifying x = -0.083578167

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.143578167, -0.083578167}

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