-.01X^2+.04X=-98.6

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Solution for -.01X^2+.04X=-98.6 equation:


Simplifying
-0.01X2 + 0.04X = -98.6

Reorder the terms:
0.04X + -0.01X2 = -98.6

Solving
0.04X + -0.01X2 = -98.6

Solving for variable 'X'.

Reorder the terms:
98.6 + 0.04X + -0.01X2 = -98.6 + 98.6

Combine like terms: -98.6 + 98.6 = 0.0
98.6 + 0.04X + -0.01X2 = 0.0

Begin completing the square.  Divide all terms by
-0.01 the coefficient of the squared term: 

Divide each side by '-0.01'.
-9860 + -4X + X2 = 0

Move the constant term to the right:

Add '9860' to each side of the equation.
-9860 + -4X + 9860 + X2 = 0 + 9860

Reorder the terms:
-9860 + 9860 + -4X + X2 = 0 + 9860

Combine like terms: -9860 + 9860 = 0
0 + -4X + X2 = 0 + 9860
-4X + X2 = 0 + 9860

Combine like terms: 0 + 9860 = 9860
-4X + X2 = 9860

The X term is -4X.  Take half its coefficient (-2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
-4X + 4 + X2 = 9860 + 4

Reorder the terms:
4 + -4X + X2 = 9860 + 4

Combine like terms: 9860 + 4 = 9864
4 + -4X + X2 = 9864

Factor a perfect square on the left side:
(X + -2)(X + -2) = 9864

Calculate the square root of the right side: 99.317672143

Break this problem into two subproblems by setting 
(X + -2) equal to 99.317672143 and -99.317672143.

Subproblem 1

X + -2 = 99.317672143 Simplifying X + -2 = 99.317672143 Reorder the terms: -2 + X = 99.317672143 Solving -2 + X = 99.317672143 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + X = 99.317672143 + 2 Combine like terms: -2 + 2 = 0 0 + X = 99.317672143 + 2 X = 99.317672143 + 2 Combine like terms: 99.317672143 + 2 = 101.317672143 X = 101.317672143 Simplifying X = 101.317672143

Subproblem 2

X + -2 = -99.317672143 Simplifying X + -2 = -99.317672143 Reorder the terms: -2 + X = -99.317672143 Solving -2 + X = -99.317672143 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + X = -99.317672143 + 2 Combine like terms: -2 + 2 = 0 0 + X = -99.317672143 + 2 X = -99.317672143 + 2 Combine like terms: -99.317672143 + 2 = -97.317672143 X = -97.317672143 Simplifying X = -97.317672143

Solution

The solution to the problem is based on the solutions from the subproblems. X = {101.317672143, -97.317672143}

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