2x^2-9x=48

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Solution for 2x^2-9x=48 equation:


Simplifying
2x2 + -9x = 48

Reorder the terms:
-9x + 2x2 = 48

Solving
-9x + 2x2 = 48

Solving for variable 'x'.

Reorder the terms:
-48 + -9x + 2x2 = 48 + -48

Combine like terms: 48 + -48 = 0
-48 + -9x + 2x2 = 0

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

Divide each side by '2'.
-24 + -4.5x + x2 = 0

Move the constant term to the right:

Add '24' to each side of the equation.
-24 + -4.5x + 24 + x2 = 0 + 24

Reorder the terms:
-24 + 24 + -4.5x + x2 = 0 + 24

Combine like terms: -24 + 24 = 0
0 + -4.5x + x2 = 0 + 24
-4.5x + x2 = 0 + 24

Combine like terms: 0 + 24 = 24
-4.5x + x2 = 24

The x term is -4.5x.  Take half its coefficient (-2.25).
Square it (5.0625) and add it to both sides.

Add '5.0625' to each side of the equation.
-4.5x + 5.0625 + x2 = 24 + 5.0625

Reorder the terms:
5.0625 + -4.5x + x2 = 24 + 5.0625

Combine like terms: 24 + 5.0625 = 29.0625
5.0625 + -4.5x + x2 = 29.0625

Factor a perfect square on the left side:
(x + -2.25)(x + -2.25) = 29.0625

Calculate the square root of the right side: 5.390964663

Break this problem into two subproblems by setting 
(x + -2.25) equal to 5.390964663 and -5.390964663.

Subproblem 1

x + -2.25 = 5.390964663 Simplifying x + -2.25 = 5.390964663 Reorder the terms: -2.25 + x = 5.390964663 Solving -2.25 + x = 5.390964663 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.25' to each side of the equation. -2.25 + 2.25 + x = 5.390964663 + 2.25 Combine like terms: -2.25 + 2.25 = 0.00 0.00 + x = 5.390964663 + 2.25 x = 5.390964663 + 2.25 Combine like terms: 5.390964663 + 2.25 = 7.640964663 x = 7.640964663 Simplifying x = 7.640964663

Subproblem 2

x + -2.25 = -5.390964663 Simplifying x + -2.25 = -5.390964663 Reorder the terms: -2.25 + x = -5.390964663 Solving -2.25 + x = -5.390964663 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.25' to each side of the equation. -2.25 + 2.25 + x = -5.390964663 + 2.25 Combine like terms: -2.25 + 2.25 = 0.00 0.00 + x = -5.390964663 + 2.25 x = -5.390964663 + 2.25 Combine like terms: -5.390964663 + 2.25 = -3.140964663 x = -3.140964663 Simplifying x = -3.140964663

Solution

The solution to the problem is based on the solutions from the subproblems. x = {7.640964663, -3.140964663}

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