-2.5x^2+10x=10

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Solution for -2.5x^2+10x=10 equation:


Simplifying
-2.5x2 + 10x = 10

Reorder the terms:
10x + -2.5x2 = 10

Solving
10x + -2.5x2 = 10

Solving for variable 'x'.

Reorder the terms:
-10 + 10x + -2.5x2 = 10 + -10

Combine like terms: 10 + -10 = 0
-10 + 10x + -2.5x2 = 0

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

Divide each side by '-2.5'.
4 + -4x + x2 = 0

Move the constant term to the right:

Add '-4' to each side of the equation.
4 + -4x + -4 + x2 = 0 + -4

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

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

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

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 = -4 + 4

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

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

Factor a perfect square on the left side:
(x + -2)(x + -2) = 0

Calculate the square root of the right side: 0

Break this problem into two subproblems by setting 
(x + -2) equal to 0 and 0.

Subproblem 1

x + -2 = 0 Simplifying x + -2 = 0 Reorder the terms: -2 + x = 0 Solving -2 + x = 0 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 = 0 + 2 Combine like terms: -2 + 2 = 0 0 + x = 0 + 2 x = 0 + 2 Combine like terms: 0 + 2 = 2 x = 2 Simplifying x = 2

Subproblem 2

x + -2 = 0 Simplifying x + -2 = 0 Reorder the terms: -2 + x = 0 Solving -2 + x = 0 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 = 0 + 2 Combine like terms: -2 + 2 = 0 0 + x = 0 + 2 x = 0 + 2 Combine like terms: 0 + 2 = 2 x = 2 Simplifying x = 2

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2, 2}

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