11x-4.9x^2+22=0

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Solution for 11x-4.9x^2+22=0 equation:


Simplifying
11x + -4.9x2 + 22 = 0

Reorder the terms:
22 + 11x + -4.9x2 = 0

Solving
22 + 11x + -4.9x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-4.9 the coefficient of the squared term: 

Divide each side by '-4.9'.
-4.489795918 + -2.244897959x + x2 = 0

Move the constant term to the right:

Add '4.489795918' to each side of the equation.
-4.489795918 + -2.244897959x + 4.489795918 + x2 = 0 + 4.489795918

Reorder the terms:
-4.489795918 + 4.489795918 + -2.244897959x + x2 = 0 + 4.489795918

Combine like terms: -4.489795918 + 4.489795918 = 0.000000000
0.000000000 + -2.244897959x + x2 = 0 + 4.489795918
-2.244897959x + x2 = 0 + 4.489795918

Combine like terms: 0 + 4.489795918 = 4.489795918
-2.244897959x + x2 = 4.489795918

The x term is -2.244897959x.  Take half its coefficient (-1.12244898).
Square it (1.259891713) and add it to both sides.

Add '1.259891713' to each side of the equation.
-2.244897959x + 1.259891713 + x2 = 4.489795918 + 1.259891713

Reorder the terms:
1.259891713 + -2.244897959x + x2 = 4.489795918 + 1.259891713

Combine like terms: 4.489795918 + 1.259891713 = 5.749687631
1.259891713 + -2.244897959x + x2 = 5.749687631

Factor a perfect square on the left side:
(x + -1.12244898)(x + -1.12244898) = 5.749687631

Calculate the square root of the right side: 2.397850627

Break this problem into two subproblems by setting 
(x + -1.12244898) equal to 2.397850627 and -2.397850627.

Subproblem 1

x + -1.12244898 = 2.397850627 Simplifying x + -1.12244898 = 2.397850627 Reorder the terms: -1.12244898 + x = 2.397850627 Solving -1.12244898 + x = 2.397850627 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.12244898' to each side of the equation. -1.12244898 + 1.12244898 + x = 2.397850627 + 1.12244898 Combine like terms: -1.12244898 + 1.12244898 = 0.00000000 0.00000000 + x = 2.397850627 + 1.12244898 x = 2.397850627 + 1.12244898 Combine like terms: 2.397850627 + 1.12244898 = 3.520299607 x = 3.520299607 Simplifying x = 3.520299607

Subproblem 2

x + -1.12244898 = -2.397850627 Simplifying x + -1.12244898 = -2.397850627 Reorder the terms: -1.12244898 + x = -2.397850627 Solving -1.12244898 + x = -2.397850627 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.12244898' to each side of the equation. -1.12244898 + 1.12244898 + x = -2.397850627 + 1.12244898 Combine like terms: -1.12244898 + 1.12244898 = 0.00000000 0.00000000 + x = -2.397850627 + 1.12244898 x = -2.397850627 + 1.12244898 Combine like terms: -2.397850627 + 1.12244898 = -1.275401647 x = -1.275401647 Simplifying x = -1.275401647

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.520299607, -1.275401647}

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