-2.5x^2-0.5x+24=

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Solution for -2.5x^2-0.5x+24= equation:


Simplifying
-2.5x2 + -0.5x + 24 = 0

Reorder the terms:
24 + -0.5x + -2.5x2 = 0

Solving
24 + -0.5x + -2.5x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-2.5 the coefficient of the squared term: 

Divide each side by '-2.5'.
-9.6 + 0.2x + x2 = 0

Move the constant term to the right:

Add '9.6' to each side of the equation.
-9.6 + 0.2x + 9.6 + x2 = 0 + 9.6

Reorder the terms:
-9.6 + 9.6 + 0.2x + x2 = 0 + 9.6

Combine like terms: -9.6 + 9.6 = 0.0
0.0 + 0.2x + x2 = 0 + 9.6
0.2x + x2 = 0 + 9.6

Combine like terms: 0 + 9.6 = 9.6
0.2x + x2 = 9.6

The x term is 0.2x.  Take half its coefficient (0.1).
Square it (0.01) and add it to both sides.

Add '0.01' to each side of the equation.
0.2x + 0.01 + x2 = 9.6 + 0.01

Reorder the terms:
0.01 + 0.2x + x2 = 9.6 + 0.01

Combine like terms: 9.6 + 0.01 = 9.61
0.01 + 0.2x + x2 = 9.61

Factor a perfect square on the left side:
(x + 0.1)(x + 0.1) = 9.61

Calculate the square root of the right side: 3.1

Break this problem into two subproblems by setting 
(x + 0.1) equal to 3.1 and -3.1.

Subproblem 1

x + 0.1 = 3.1 Simplifying x + 0.1 = 3.1 Reorder the terms: 0.1 + x = 3.1 Solving 0.1 + x = 3.1 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.1' to each side of the equation. 0.1 + -0.1 + x = 3.1 + -0.1 Combine like terms: 0.1 + -0.1 = 0.0 0.0 + x = 3.1 + -0.1 x = 3.1 + -0.1 Combine like terms: 3.1 + -0.1 = 3 x = 3 Simplifying x = 3

Subproblem 2

x + 0.1 = -3.1 Simplifying x + 0.1 = -3.1 Reorder the terms: 0.1 + x = -3.1 Solving 0.1 + x = -3.1 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.1' to each side of the equation. 0.1 + -0.1 + x = -3.1 + -0.1 Combine like terms: 0.1 + -0.1 = 0.0 0.0 + x = -3.1 + -0.1 x = -3.1 + -0.1 Combine like terms: -3.1 + -0.1 = -3.2 x = -3.2 Simplifying x = -3.2

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3, -3.2}

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