0=0.03x^2-1.2x+2

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Solution for 0=0.03x^2-1.2x+2 equation:


Simplifying
0 = 0.03x2 + -1.2x + 2

Reorder the terms:
0 = 2 + -1.2x + 0.03x2

Solving
0 = 2 + -1.2x + 0.03x2

Solving for variable 'x'.

Combine like terms: 0 + -2 = -2
-2 + 1.2x + -0.03x2 = 2 + -1.2x + 0.03x2 + -2 + 1.2x + -0.03x2

Reorder the terms:
-2 + 1.2x + -0.03x2 = 2 + -2 + -1.2x + 1.2x + 0.03x2 + -0.03x2

Combine like terms: 2 + -2 = 0
-2 + 1.2x + -0.03x2 = 0 + -1.2x + 1.2x + 0.03x2 + -0.03x2
-2 + 1.2x + -0.03x2 = -1.2x + 1.2x + 0.03x2 + -0.03x2

Combine like terms: -1.2x + 1.2x = 0.0
-2 + 1.2x + -0.03x2 = 0.0 + 0.03x2 + -0.03x2
-2 + 1.2x + -0.03x2 = 0.03x2 + -0.03x2

Combine like terms: 0.03x2 + -0.03x2 = 0.00
-2 + 1.2x + -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'.
66.66666667 + -40x + x2 = 0

Move the constant term to the right:

Add '-66.66666667' to each side of the equation.
66.66666667 + -40x + -66.66666667 + x2 = 0 + -66.66666667

Reorder the terms:
66.66666667 + -66.66666667 + -40x + x2 = 0 + -66.66666667

Combine like terms: 66.66666667 + -66.66666667 = 0.00000000
0.00000000 + -40x + x2 = 0 + -66.66666667
-40x + x2 = 0 + -66.66666667

Combine like terms: 0 + -66.66666667 = -66.66666667
-40x + x2 = -66.66666667

The x term is -40x.  Take half its coefficient (-20).
Square it (400) and add it to both sides.

Add '400' to each side of the equation.
-40x + 400 + x2 = -66.66666667 + 400

Reorder the terms:
400 + -40x + x2 = -66.66666667 + 400

Combine like terms: -66.66666667 + 400 = 333.33333333
400 + -40x + x2 = 333.33333333

Factor a perfect square on the left side:
(x + -20)(x + -20) = 333.33333333

Calculate the square root of the right side: 18.257418583

Break this problem into two subproblems by setting 
(x + -20) equal to 18.257418583 and -18.257418583.

Subproblem 1

x + -20 = 18.257418583 Simplifying x + -20 = 18.257418583 Reorder the terms: -20 + x = 18.257418583 Solving -20 + x = 18.257418583 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '20' to each side of the equation. -20 + 20 + x = 18.257418583 + 20 Combine like terms: -20 + 20 = 0 0 + x = 18.257418583 + 20 x = 18.257418583 + 20 Combine like terms: 18.257418583 + 20 = 38.257418583 x = 38.257418583 Simplifying x = 38.257418583

Subproblem 2

x + -20 = -18.257418583 Simplifying x + -20 = -18.257418583 Reorder the terms: -20 + x = -18.257418583 Solving -20 + x = -18.257418583 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '20' to each side of the equation. -20 + 20 + x = -18.257418583 + 20 Combine like terms: -20 + 20 = 0 0 + x = -18.257418583 + 20 x = -18.257418583 + 20 Combine like terms: -18.257418583 + 20 = 1.742581417 x = 1.742581417 Simplifying x = 1.742581417

Solution

The solution to the problem is based on the solutions from the subproblems. x = {38.257418583, 1.742581417}

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