260=.03x^2+.2x

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Solution for 260=.03x^2+.2x equation:


Simplifying
260 = 0.03x2 + 0.2x

Reorder the terms:
260 = 0.2x + 0.03x2

Solving
260 = 0.2x + 0.03x2

Solving for variable 'x'.

Reorder the terms:
260 + -0.2x + -0.03x2 = 0.2x + -0.2x + 0.03x2 + -0.03x2

Combine like terms: 0.2x + -0.2x = 0.0
260 + -0.2x + -0.03x2 = 0.0 + 0.03x2 + -0.03x2
260 + -0.2x + -0.03x2 = 0.03x2 + -0.03x2

Combine like terms: 0.03x2 + -0.03x2 = 0.00
260 + -0.2x + -0.03x2 = 0.00

Begin completing the square.  Divide all terms by
-0.03 the coefficient of the squared term: 

Divide each side by '-0.03'.
-8666.666667 + 6.666666667x + x2 = 0

Move the constant term to the right:

Add '8666.666667' to each side of the equation.
-8666.666667 + 6.666666667x + 8666.666667 + x2 = 0 + 8666.666667

Reorder the terms:
-8666.666667 + 8666.666667 + 6.666666667x + x2 = 0 + 8666.666667

Combine like terms: -8666.666667 + 8666.666667 = 0.000000
0.000000 + 6.666666667x + x2 = 0 + 8666.666667
6.666666667x + x2 = 0 + 8666.666667

Combine like terms: 0 + 8666.666667 = 8666.666667
6.666666667x + x2 = 8666.666667

The x term is 6.666666667x.  Take half its coefficient (3.333333334).
Square it (11.11111112) and add it to both sides.

Add '11.11111112' to each side of the equation.
6.666666667x + 11.11111112 + x2 = 8666.666667 + 11.11111112

Reorder the terms:
11.11111112 + 6.666666667x + x2 = 8666.666667 + 11.11111112

Combine like terms: 8666.666667 + 11.11111112 = 8677.77777812
11.11111112 + 6.666666667x + x2 = 8677.77777812

Factor a perfect square on the left side:
(x + 3.333333334)(x + 3.333333334) = 8677.77777812

Calculate the square root of the right side: 93.154590752

Break this problem into two subproblems by setting 
(x + 3.333333334) equal to 93.154590752 and -93.154590752.

Subproblem 1

x + 3.333333334 = 93.154590752 Simplifying x + 3.333333334 = 93.154590752 Reorder the terms: 3.333333334 + x = 93.154590752 Solving 3.333333334 + x = 93.154590752 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.333333334' to each side of the equation. 3.333333334 + -3.333333334 + x = 93.154590752 + -3.333333334 Combine like terms: 3.333333334 + -3.333333334 = 0.000000000 0.000000000 + x = 93.154590752 + -3.333333334 x = 93.154590752 + -3.333333334 Combine like terms: 93.154590752 + -3.333333334 = 89.821257418 x = 89.821257418 Simplifying x = 89.821257418

Subproblem 2

x + 3.333333334 = -93.154590752 Simplifying x + 3.333333334 = -93.154590752 Reorder the terms: 3.333333334 + x = -93.154590752 Solving 3.333333334 + x = -93.154590752 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.333333334' to each side of the equation. 3.333333334 + -3.333333334 + x = -93.154590752 + -3.333333334 Combine like terms: 3.333333334 + -3.333333334 = 0.000000000 0.000000000 + x = -93.154590752 + -3.333333334 x = -93.154590752 + -3.333333334 Combine like terms: -93.154590752 + -3.333333334 = -96.487924086 x = -96.487924086 Simplifying x = -96.487924086

Solution

The solution to the problem is based on the solutions from the subproblems. x = {89.821257418, -96.487924086}

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