0.02x+0.01x+0.05x(2x)=10.40

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Solution for 0.02x+0.01x+0.05x(2x)=10.40 equation:


Simplifying
0.02x + 0.01x + 0.05x(2x) = 10.40

Remove parenthesis around (2x)
0.02x + 0.01x + 0.05x * 2x = 10.40

Reorder the terms for easier multiplication:
0.02x + 0.01x + 0.05 * 2x * x = 10.40

Multiply 0.05 * 2
0.02x + 0.01x + 0.1x * x = 10.40

Multiply x * x
0.02x + 0.01x + 0.1x2 = 10.40

Combine like terms: 0.02x + 0.01x = 0.03x
0.03x + 0.1x2 = 10.40

Solving
0.03x + 0.1x2 = 10.40

Solving for variable 'x'.

Reorder the terms:
-10.40 + 0.03x + 0.1x2 = 10.40 + -10.40

Combine like terms: 10.40 + -10.40 = 0.00
-10.40 + 0.03x + 0.1x2 = 0.00

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

Divide each side by '0.1'.
-104 + 0.3x + x2 = 0.0

Move the constant term to the right:

Add '104' to each side of the equation.
-104 + 0.3x + 104 + x2 = 0.0 + 104

Reorder the terms:
-104 + 104 + 0.3x + x2 = 0.0 + 104

Combine like terms: -104 + 104 = 0
0 + 0.3x + x2 = 0.0 + 104
0.3x + x2 = 0.0 + 104

Combine like terms: 0.0 + 104 = 104
0.3x + x2 = 104

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 = 104 + 0.0225

Reorder the terms:
0.0225 + 0.3x + x2 = 104 + 0.0225

Combine like terms: 104 + 0.0225 = 104.0225
0.0225 + 0.3x + x2 = 104.0225

Factor a perfect square on the left side:
(x + 0.15)(x + 0.15) = 104.0225

Calculate the square root of the right side: 10.199142121

Break this problem into two subproblems by setting 
(x + 0.15) equal to 10.199142121 and -10.199142121.

Subproblem 1

x + 0.15 = 10.199142121 Simplifying x + 0.15 = 10.199142121 Reorder the terms: 0.15 + x = 10.199142121 Solving 0.15 + x = 10.199142121 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 = 10.199142121 + -0.15 Combine like terms: 0.15 + -0.15 = 0.00 0.00 + x = 10.199142121 + -0.15 x = 10.199142121 + -0.15 Combine like terms: 10.199142121 + -0.15 = 10.049142121 x = 10.049142121 Simplifying x = 10.049142121

Subproblem 2

x + 0.15 = -10.199142121 Simplifying x + 0.15 = -10.199142121 Reorder the terms: 0.15 + x = -10.199142121 Solving 0.15 + x = -10.199142121 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 = -10.199142121 + -0.15 Combine like terms: 0.15 + -0.15 = 0.00 0.00 + x = -10.199142121 + -0.15 x = -10.199142121 + -0.15 Combine like terms: -10.199142121 + -0.15 = -10.349142121 x = -10.349142121 Simplifying x = -10.349142121

Solution

The solution to the problem is based on the solutions from the subproblems. x = {10.049142121, -10.349142121}

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