0=-0.025x^2+x+6

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Solution for 0=-0.025x^2+x+6 equation:


Simplifying
0 = -0.025x2 + x + 6

Reorder the terms:
0 = 6 + x + -0.025x2

Solving
0 = 6 + x + -0.025x2

Solving for variable 'x'.

Combine like terms: 0 + -6 = -6
-6 + -1x + 0.025x2 = 6 + x + -0.025x2 + -6 + -1x + 0.025x2

Reorder the terms:
-6 + -1x + 0.025x2 = 6 + -6 + x + -1x + -0.025x2 + 0.025x2

Combine like terms: 6 + -6 = 0
-6 + -1x + 0.025x2 = 0 + x + -1x + -0.025x2 + 0.025x2
-6 + -1x + 0.025x2 = x + -1x + -0.025x2 + 0.025x2

Combine like terms: x + -1x = 0
-6 + -1x + 0.025x2 = 0 + -0.025x2 + 0.025x2
-6 + -1x + 0.025x2 = -0.025x2 + 0.025x2

Combine like terms: -0.025x2 + 0.025x2 = 0.000
-6 + -1x + 0.025x2 = 0.000

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

Divide each side by '0.025'.
-240 + -40x + x2 = 0

Move the constant term to the right:

Add '240' to each side of the equation.
-240 + -40x + 240 + x2 = 0 + 240

Reorder the terms:
-240 + 240 + -40x + x2 = 0 + 240

Combine like terms: -240 + 240 = 0
0 + -40x + x2 = 0 + 240
-40x + x2 = 0 + 240

Combine like terms: 0 + 240 = 240
-40x + x2 = 240

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 = 240 + 400

Reorder the terms:
400 + -40x + x2 = 240 + 400

Combine like terms: 240 + 400 = 640
400 + -40x + x2 = 640

Factor a perfect square on the left side:
(x + -20)(x + -20) = 640

Calculate the square root of the right side: 25.298221281

Break this problem into two subproblems by setting 
(x + -20) equal to 25.298221281 and -25.298221281.

Subproblem 1

x + -20 = 25.298221281 Simplifying x + -20 = 25.298221281 Reorder the terms: -20 + x = 25.298221281 Solving -20 + x = 25.298221281 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 = 25.298221281 + 20 Combine like terms: -20 + 20 = 0 0 + x = 25.298221281 + 20 x = 25.298221281 + 20 Combine like terms: 25.298221281 + 20 = 45.298221281 x = 45.298221281 Simplifying x = 45.298221281

Subproblem 2

x + -20 = -25.298221281 Simplifying x + -20 = -25.298221281 Reorder the terms: -20 + x = -25.298221281 Solving -20 + x = -25.298221281 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 = -25.298221281 + 20 Combine like terms: -20 + 20 = 0 0 + x = -25.298221281 + 20 x = -25.298221281 + 20 Combine like terms: -25.298221281 + 20 = -5.298221281 x = -5.298221281 Simplifying x = -5.298221281

Solution

The solution to the problem is based on the solutions from the subproblems. x = {45.298221281, -5.298221281}

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