(0.1+x)(0.20+x)=0.00000000012

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Solution for (0.1+x)(0.20+x)=0.00000000012 equation:


Simplifying
(0.1 + x)(0.20 + x) = 0.00000000012

Multiply (0.1 + x) * (0.20 + x)
(0.1(0.20 + x) + x(0.20 + x)) = 0.00000000012
((0.20 * 0.1 + x * 0.1) + x(0.20 + x)) = 0.00000000012
((0.02 + 0.1x) + x(0.20 + x)) = 0.00000000012
(0.02 + 0.1x + (0.20 * x + x * x)) = 0.00000000012
(0.02 + 0.1x + (0.20x + x2)) = 0.00000000012

Combine like terms: 0.1x + 0.20x = 0.3x
(0.02 + 0.3x + x2) = 0.00000000012

Solving
0.02 + 0.3x + x2 = 0.00000000012

Solving for variable 'x'.

Reorder the terms:
0.02 + -0.00000000012 + 0.3x + x2 = 0.00000000012 + -0.00000000012

Combine like terms: 0.02 + -0.00000000012 = 0.01999999988
0.01999999988 + 0.3x + x2 = 0.00000000012 + -0.00000000012

Combine like terms: 0.00000000012 + -0.00000000012 = 0.00000000000
0.01999999988 + 0.3x + x2 = 0.00000000000

Begin completing the square.

Move the constant term to the right:

Add '-0.01999999988' to each side of the equation.
0.01999999988 + 0.3x + -0.01999999988 + x2 = 0.00000000000 + -0.01999999988

Reorder the terms:
0.01999999988 + -0.01999999988 + 0.3x + x2 = 0.00000000000 + -0.01999999988

Combine like terms: 0.01999999988 + -0.01999999988 = 0.00000000000
0.00000000000 + 0.3x + x2 = 0.00000000000 + -0.01999999988
0.3x + x2 = 0.00000000000 + -0.01999999988

Combine like terms: 0.00000000000 + -0.01999999988 = -0.01999999988
0.3x + x2 = -0.01999999988

The x term is 0.3x.  Take half its coefficient (0.15).
Square it (0.0225) and add it to both sides.

Add '0.0225' to each side of the equation.
0.3x + 0.0225 + x2 = -0.01999999988 + 0.0225

Reorder the terms:
0.0225 + 0.3x + x2 = -0.01999999988 + 0.0225

Combine like terms: -0.01999999988 + 0.0225 = 0.00250000012
0.0225 + 0.3x + x2 = 0.00250000012

Factor a perfect square on the left side:
(x + 0.15)(x + 0.15) = 0.00250000012

Calculate the square root of the right side: 0.050000001

Break this problem into two subproblems by setting 
(x + 0.15) equal to 0.050000001 and -0.050000001.

Subproblem 1

x + 0.15 = 0.050000001 Simplifying x + 0.15 = 0.050000001 Reorder the terms: 0.15 + x = 0.050000001 Solving 0.15 + x = 0.050000001 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.15' to each side of the equation. 0.15 + -0.15 + x = 0.050000001 + -0.15 Combine like terms: 0.15 + -0.15 = 0.00 0.00 + x = 0.050000001 + -0.15 x = 0.050000001 + -0.15 Combine like terms: 0.050000001 + -0.15 = -0.099999999 x = -0.099999999 Simplifying x = -0.099999999

Subproblem 2

x + 0.15 = -0.050000001 Simplifying x + 0.15 = -0.050000001 Reorder the terms: 0.15 + x = -0.050000001 Solving 0.15 + x = -0.050000001 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.15' to each side of the equation. 0.15 + -0.15 + x = -0.050000001 + -0.15 Combine like terms: 0.15 + -0.15 = 0.00 0.00 + x = -0.050000001 + -0.15 x = -0.050000001 + -0.15 Combine like terms: -0.050000001 + -0.15 = -0.200000001 x = -0.200000001 Simplifying x = -0.200000001

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.099999999, -0.200000001}

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