a^2+11a-22=0

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


Simplifying
a2 + 11a + -22 = 0

Reorder the terms:
-22 + 11a + a2 = 0

Solving
-22 + 11a + a2 = 0

Solving for variable 'a'.

Begin completing the square.

Move the constant term to the right:

Add '22' to each side of the equation.
-22 + 11a + 22 + a2 = 0 + 22

Reorder the terms:
-22 + 22 + 11a + a2 = 0 + 22

Combine like terms: -22 + 22 = 0
0 + 11a + a2 = 0 + 22
11a + a2 = 0 + 22

Combine like terms: 0 + 22 = 22
11a + a2 = 22

The a term is 11a.  Take half its coefficient (5.5).
Square it (30.25) and add it to both sides.

Add '30.25' to each side of the equation.
11a + 30.25 + a2 = 22 + 30.25

Reorder the terms:
30.25 + 11a + a2 = 22 + 30.25

Combine like terms: 22 + 30.25 = 52.25
30.25 + 11a + a2 = 52.25

Factor a perfect square on the left side:
(a + 5.5)(a + 5.5) = 52.25

Calculate the square root of the right side: 7.228416147

Break this problem into two subproblems by setting 
(a + 5.5) equal to 7.228416147 and -7.228416147.

Subproblem 1

a + 5.5 = 7.228416147 Simplifying a + 5.5 = 7.228416147 Reorder the terms: 5.5 + a = 7.228416147 Solving 5.5 + a = 7.228416147 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-5.5' to each side of the equation. 5.5 + -5.5 + a = 7.228416147 + -5.5 Combine like terms: 5.5 + -5.5 = 0.0 0.0 + a = 7.228416147 + -5.5 a = 7.228416147 + -5.5 Combine like terms: 7.228416147 + -5.5 = 1.728416147 a = 1.728416147 Simplifying a = 1.728416147

Subproblem 2

a + 5.5 = -7.228416147 Simplifying a + 5.5 = -7.228416147 Reorder the terms: 5.5 + a = -7.228416147 Solving 5.5 + a = -7.228416147 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-5.5' to each side of the equation. 5.5 + -5.5 + a = -7.228416147 + -5.5 Combine like terms: 5.5 + -5.5 = 0.0 0.0 + a = -7.228416147 + -5.5 a = -7.228416147 + -5.5 Combine like terms: -7.228416147 + -5.5 = -12.728416147 a = -12.728416147 Simplifying a = -12.728416147

Solution

The solution to the problem is based on the solutions from the subproblems. a = {1.728416147, -12.728416147}

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