5x-1.5-.2x^2-.25=0

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Solution for 5x-1.5-.2x^2-.25=0 equation:


Simplifying
5x + -1.5 + -0.2x2 + -0.25 = 0

Reorder the terms:
-1.5 + -0.25 + 5x + -0.2x2 = 0

Combine like terms: -1.5 + -0.25 = -1.75
-1.75 + 5x + -0.2x2 = 0

Solving
-1.75 + 5x + -0.2x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-0.2 the coefficient of the squared term: 

Divide each side by '-0.2'.
8.75 + -25x + x2 = 0

Move the constant term to the right:

Add '-8.75' to each side of the equation.
8.75 + -25x + -8.75 + x2 = 0 + -8.75

Reorder the terms:
8.75 + -8.75 + -25x + x2 = 0 + -8.75

Combine like terms: 8.75 + -8.75 = 0.00
0.00 + -25x + x2 = 0 + -8.75
-25x + x2 = 0 + -8.75

Combine like terms: 0 + -8.75 = -8.75
-25x + x2 = -8.75

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 = -8.75 + 156.25

Reorder the terms:
156.25 + -25x + x2 = -8.75 + 156.25

Combine like terms: -8.75 + 156.25 = 147.5
156.25 + -25x + x2 = 147.5

Factor a perfect square on the left side:
(x + -12.5)(x + -12.5) = 147.5

Calculate the square root of the right side: 12.144957801

Break this problem into two subproblems by setting 
(x + -12.5) equal to 12.144957801 and -12.144957801.

Subproblem 1

x + -12.5 = 12.144957801 Simplifying x + -12.5 = 12.144957801 Reorder the terms: -12.5 + x = 12.144957801 Solving -12.5 + x = 12.144957801 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 = 12.144957801 + 12.5 Combine like terms: -12.5 + 12.5 = 0.0 0.0 + x = 12.144957801 + 12.5 x = 12.144957801 + 12.5 Combine like terms: 12.144957801 + 12.5 = 24.644957801 x = 24.644957801 Simplifying x = 24.644957801

Subproblem 2

x + -12.5 = -12.144957801 Simplifying x + -12.5 = -12.144957801 Reorder the terms: -12.5 + x = -12.144957801 Solving -12.5 + x = -12.144957801 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 = -12.144957801 + 12.5 Combine like terms: -12.5 + 12.5 = 0.0 0.0 + x = -12.144957801 + 12.5 x = -12.144957801 + 12.5 Combine like terms: -12.144957801 + 12.5 = 0.355042199 x = 0.355042199 Simplifying x = 0.355042199

Solution

The solution to the problem is based on the solutions from the subproblems. x = {24.644957801, 0.355042199}

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