2X^2-5X-48=0

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Solution for 2X^2-5X-48=0 equation:


Simplifying
2X2 + -5X + -48 = 0

Reorder the terms:
-48 + -5X + 2X2 = 0

Solving
-48 + -5X + 2X2 = 0

Solving for variable 'X'.

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

Divide each side by '2'.
-24 + -2.5X + X2 = 0

Move the constant term to the right:

Add '24' to each side of the equation.
-24 + -2.5X + 24 + X2 = 0 + 24

Reorder the terms:
-24 + 24 + -2.5X + X2 = 0 + 24

Combine like terms: -24 + 24 = 0
0 + -2.5X + X2 = 0 + 24
-2.5X + X2 = 0 + 24

Combine like terms: 0 + 24 = 24
-2.5X + X2 = 24

The X term is -2.5X.  Take half its coefficient (-1.25).
Square it (1.5625) and add it to both sides.

Add '1.5625' to each side of the equation.
-2.5X + 1.5625 + X2 = 24 + 1.5625

Reorder the terms:
1.5625 + -2.5X + X2 = 24 + 1.5625

Combine like terms: 24 + 1.5625 = 25.5625
1.5625 + -2.5X + X2 = 25.5625

Factor a perfect square on the left side:
(X + -1.25)(X + -1.25) = 25.5625

Calculate the square root of the right side: 5.055937104

Break this problem into two subproblems by setting 
(X + -1.25) equal to 5.055937104 and -5.055937104.

Subproblem 1

X + -1.25 = 5.055937104 Simplifying X + -1.25 = 5.055937104 Reorder the terms: -1.25 + X = 5.055937104 Solving -1.25 + X = 5.055937104 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '1.25' to each side of the equation. -1.25 + 1.25 + X = 5.055937104 + 1.25 Combine like terms: -1.25 + 1.25 = 0.00 0.00 + X = 5.055937104 + 1.25 X = 5.055937104 + 1.25 Combine like terms: 5.055937104 + 1.25 = 6.305937104 X = 6.305937104 Simplifying X = 6.305937104

Subproblem 2

X + -1.25 = -5.055937104 Simplifying X + -1.25 = -5.055937104 Reorder the terms: -1.25 + X = -5.055937104 Solving -1.25 + X = -5.055937104 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '1.25' to each side of the equation. -1.25 + 1.25 + X = -5.055937104 + 1.25 Combine like terms: -1.25 + 1.25 = 0.00 0.00 + X = -5.055937104 + 1.25 X = -5.055937104 + 1.25 Combine like terms: -5.055937104 + 1.25 = -3.805937104 X = -3.805937104 Simplifying X = -3.805937104

Solution

The solution to the problem is based on the solutions from the subproblems. X = {6.305937104, -3.805937104}

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