0.04x-0.07x^2=-2

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Solution for 0.04x-0.07x^2=-2 equation:


Simplifying
0.04x + -0.07x2 = -2

Solving
0.04x + -0.07x2 = -2

Solving for variable 'x'.

Reorder the terms:
2 + 0.04x + -0.07x2 = -2 + 2

Combine like terms: -2 + 2 = 0
2 + 0.04x + -0.07x2 = 0

Begin completing the square.  Divide all terms by
-0.07 the coefficient of the squared term: 

Divide each side by '-0.07'.
-28.57142857 + -0.5714285714x + x2 = 0

Move the constant term to the right:

Add '28.57142857' to each side of the equation.
-28.57142857 + -0.5714285714x + 28.57142857 + x2 = 0 + 28.57142857

Reorder the terms:
-28.57142857 + 28.57142857 + -0.5714285714x + x2 = 0 + 28.57142857

Combine like terms: -28.57142857 + 28.57142857 = 0.00000000
0.00000000 + -0.5714285714x + x2 = 0 + 28.57142857
-0.5714285714x + x2 = 0 + 28.57142857

Combine like terms: 0 + 28.57142857 = 28.57142857
-0.5714285714x + x2 = 28.57142857

The x term is -0.5714285714x.  Take half its coefficient (-0.2857142857).
Square it (0.08163265305) and add it to both sides.

Add '0.08163265305' to each side of the equation.
-0.5714285714x + 0.08163265305 + x2 = 28.57142857 + 0.08163265305

Reorder the terms:
0.08163265305 + -0.5714285714x + x2 = 28.57142857 + 0.08163265305

Combine like terms: 28.57142857 + 0.08163265305 = 28.65306122305
0.08163265305 + -0.5714285714x + x2 = 28.65306122305

Factor a perfect square on the left side:
(x + -0.2857142857)(x + -0.2857142857) = 28.65306122305

Calculate the square root of the right side: 5.352855427

Break this problem into two subproblems by setting 
(x + -0.2857142857) equal to 5.352855427 and -5.352855427.

Subproblem 1

x + -0.2857142857 = 5.352855427 Simplifying x + -0.2857142857 = 5.352855427 Reorder the terms: -0.2857142857 + x = 5.352855427 Solving -0.2857142857 + x = 5.352855427 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.2857142857' to each side of the equation. -0.2857142857 + 0.2857142857 + x = 5.352855427 + 0.2857142857 Combine like terms: -0.2857142857 + 0.2857142857 = 0.0000000000 0.0000000000 + x = 5.352855427 + 0.2857142857 x = 5.352855427 + 0.2857142857 Combine like terms: 5.352855427 + 0.2857142857 = 5.6385697127 x = 5.6385697127 Simplifying x = 5.6385697127

Subproblem 2

x + -0.2857142857 = -5.352855427 Simplifying x + -0.2857142857 = -5.352855427 Reorder the terms: -0.2857142857 + x = -5.352855427 Solving -0.2857142857 + x = -5.352855427 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.2857142857' to each side of the equation. -0.2857142857 + 0.2857142857 + x = -5.352855427 + 0.2857142857 Combine like terms: -0.2857142857 + 0.2857142857 = 0.0000000000 0.0000000000 + x = -5.352855427 + 0.2857142857 x = -5.352855427 + 0.2857142857 Combine like terms: -5.352855427 + 0.2857142857 = -5.0671411413 x = -5.0671411413 Simplifying x = -5.0671411413

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.6385697127, -5.0671411413}

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