2x^2-4.5x=10

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Solution for 2x^2-4.5x=10 equation:


Simplifying
2x2 + -4.5x = 10

Reorder the terms:
-4.5x + 2x2 = 10

Solving
-4.5x + 2x2 = 10

Solving for variable 'x'.

Reorder the terms:
-10 + -4.5x + 2x2 = 10 + -10

Combine like terms: 10 + -10 = 0
-10 + -4.5x + 2x2 = 0

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

Divide each side by '2'.
-5 + -2.25x + x2 = 0

Move the constant term to the right:

Add '5' to each side of the equation.
-5 + -2.25x + 5 + x2 = 0 + 5

Reorder the terms:
-5 + 5 + -2.25x + x2 = 0 + 5

Combine like terms: -5 + 5 = 0
0 + -2.25x + x2 = 0 + 5
-2.25x + x2 = 0 + 5

Combine like terms: 0 + 5 = 5
-2.25x + x2 = 5

The x term is -2.25x.  Take half its coefficient (-1.125).
Square it (1.265625) and add it to both sides.

Add '1.265625' to each side of the equation.
-2.25x + 1.265625 + x2 = 5 + 1.265625

Reorder the terms:
1.265625 + -2.25x + x2 = 5 + 1.265625

Combine like terms: 5 + 1.265625 = 6.265625
1.265625 + -2.25x + x2 = 6.265625

Factor a perfect square on the left side:
(x + -1.125)(x + -1.125) = 6.265625

Calculate the square root of the right side: 2.503123049

Break this problem into two subproblems by setting 
(x + -1.125) equal to 2.503123049 and -2.503123049.

Subproblem 1

x + -1.125 = 2.503123049 Simplifying x + -1.125 = 2.503123049 Reorder the terms: -1.125 + x = 2.503123049 Solving -1.125 + x = 2.503123049 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.125' to each side of the equation. -1.125 + 1.125 + x = 2.503123049 + 1.125 Combine like terms: -1.125 + 1.125 = 0.000 0.000 + x = 2.503123049 + 1.125 x = 2.503123049 + 1.125 Combine like terms: 2.503123049 + 1.125 = 3.628123049 x = 3.628123049 Simplifying x = 3.628123049

Subproblem 2

x + -1.125 = -2.503123049 Simplifying x + -1.125 = -2.503123049 Reorder the terms: -1.125 + x = -2.503123049 Solving -1.125 + x = -2.503123049 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.125' to each side of the equation. -1.125 + 1.125 + x = -2.503123049 + 1.125 Combine like terms: -1.125 + 1.125 = 0.000 0.000 + x = -2.503123049 + 1.125 x = -2.503123049 + 1.125 Combine like terms: -2.503123049 + 1.125 = -1.378123049 x = -1.378123049 Simplifying x = -1.378123049

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.628123049, -1.378123049}

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