0=-0.16x^2+4x+10

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Solution for 0=-0.16x^2+4x+10 equation:


Simplifying
0 = -0.16x2 + 4x + 10

Reorder the terms:
0 = 10 + 4x + -0.16x2

Solving
0 = 10 + 4x + -0.16x2

Solving for variable 'x'.

Combine like terms: 0 + -10 = -10
-10 + -4x + 0.16x2 = 10 + 4x + -0.16x2 + -10 + -4x + 0.16x2

Reorder the terms:
-10 + -4x + 0.16x2 = 10 + -10 + 4x + -4x + -0.16x2 + 0.16x2

Combine like terms: 10 + -10 = 0
-10 + -4x + 0.16x2 = 0 + 4x + -4x + -0.16x2 + 0.16x2
-10 + -4x + 0.16x2 = 4x + -4x + -0.16x2 + 0.16x2

Combine like terms: 4x + -4x = 0
-10 + -4x + 0.16x2 = 0 + -0.16x2 + 0.16x2
-10 + -4x + 0.16x2 = -0.16x2 + 0.16x2

Combine like terms: -0.16x2 + 0.16x2 = 0.00
-10 + -4x + 0.16x2 = 0.00

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

Divide each side by '0.16'.
-62.5 + -25x + x2 = 0

Move the constant term to the right:

Add '62.5' to each side of the equation.
-62.5 + -25x + 62.5 + x2 = 0 + 62.5

Reorder the terms:
-62.5 + 62.5 + -25x + x2 = 0 + 62.5

Combine like terms: -62.5 + 62.5 = 0.0
0.0 + -25x + x2 = 0 + 62.5
-25x + x2 = 0 + 62.5

Combine like terms: 0 + 62.5 = 62.5
-25x + x2 = 62.5

The x term is -25x.  Take half its coefficient (-12.5).
Square it (156.25) and add it to both sides.

Add '156.25' to each side of the equation.
-25x + 156.25 + x2 = 62.5 + 156.25

Reorder the terms:
156.25 + -25x + x2 = 62.5 + 156.25

Combine like terms: 62.5 + 156.25 = 218.75
156.25 + -25x + x2 = 218.75

Factor a perfect square on the left side:
(x + -12.5)(x + -12.5) = 218.75

Calculate the square root of the right side: 14.790199458

Break this problem into two subproblems by setting 
(x + -12.5) equal to 14.790199458 and -14.790199458.

Subproblem 1

x + -12.5 = 14.790199458 Simplifying x + -12.5 = 14.790199458 Reorder the terms: -12.5 + x = 14.790199458 Solving -12.5 + x = 14.790199458 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '12.5' to each side of the equation. -12.5 + 12.5 + x = 14.790199458 + 12.5 Combine like terms: -12.5 + 12.5 = 0.0 0.0 + x = 14.790199458 + 12.5 x = 14.790199458 + 12.5 Combine like terms: 14.790199458 + 12.5 = 27.290199458 x = 27.290199458 Simplifying x = 27.290199458

Subproblem 2

x + -12.5 = -14.790199458 Simplifying x + -12.5 = -14.790199458 Reorder the terms: -12.5 + x = -14.790199458 Solving -12.5 + x = -14.790199458 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '12.5' to each side of the equation. -12.5 + 12.5 + x = -14.790199458 + 12.5 Combine like terms: -12.5 + 12.5 = 0.0 0.0 + x = -14.790199458 + 12.5 x = -14.790199458 + 12.5 Combine like terms: -14.790199458 + 12.5 = -2.290199458 x = -2.290199458 Simplifying x = -2.290199458

Solution

The solution to the problem is based on the solutions from the subproblems. x = {27.290199458, -2.290199458}

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