5X^2-22X-75=0

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Solution for 5X^2-22X-75=0 equation:


Simplifying
5X2 + -22X + -75 = 0

Reorder the terms:
-75 + -22X + 5X2 = 0

Solving
-75 + -22X + 5X2 = 0

Solving for variable 'X'.

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

Divide each side by '5'.
-15 + -4.4X + X2 = 0

Move the constant term to the right:

Add '15' to each side of the equation.
-15 + -4.4X + 15 + X2 = 0 + 15

Reorder the terms:
-15 + 15 + -4.4X + X2 = 0 + 15

Combine like terms: -15 + 15 = 0
0 + -4.4X + X2 = 0 + 15
-4.4X + X2 = 0 + 15

Combine like terms: 0 + 15 = 15
-4.4X + X2 = 15

The X term is -4.4X.  Take half its coefficient (-2.2).
Square it (4.84) and add it to both sides.

Add '4.84' to each side of the equation.
-4.4X + 4.84 + X2 = 15 + 4.84

Reorder the terms:
4.84 + -4.4X + X2 = 15 + 4.84

Combine like terms: 15 + 4.84 = 19.84
4.84 + -4.4X + X2 = 19.84

Factor a perfect square on the left side:
(X + -2.2)(X + -2.2) = 19.84

Calculate the square root of the right side: 4.45421149

Break this problem into two subproblems by setting 
(X + -2.2) equal to 4.45421149 and -4.45421149.

Subproblem 1

X + -2.2 = 4.45421149 Simplifying X + -2.2 = 4.45421149 Reorder the terms: -2.2 + X = 4.45421149 Solving -2.2 + X = 4.45421149 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '2.2' to each side of the equation. -2.2 + 2.2 + X = 4.45421149 + 2.2 Combine like terms: -2.2 + 2.2 = 0.0 0.0 + X = 4.45421149 + 2.2 X = 4.45421149 + 2.2 Combine like terms: 4.45421149 + 2.2 = 6.65421149 X = 6.65421149 Simplifying X = 6.65421149

Subproblem 2

X + -2.2 = -4.45421149 Simplifying X + -2.2 = -4.45421149 Reorder the terms: -2.2 + X = -4.45421149 Solving -2.2 + X = -4.45421149 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '2.2' to each side of the equation. -2.2 + 2.2 + X = -4.45421149 + 2.2 Combine like terms: -2.2 + 2.2 = 0.0 0.0 + X = -4.45421149 + 2.2 X = -4.45421149 + 2.2 Combine like terms: -4.45421149 + 2.2 = -2.25421149 X = -2.25421149 Simplifying X = -2.25421149

Solution

The solution to the problem is based on the solutions from the subproblems. X = {6.65421149, -2.25421149}

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