2a^2-11a=2

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Solution for 2a^2-11a=2 equation:


Simplifying
2a2 + -11a = 2

Reorder the terms:
-11a + 2a2 = 2

Solving
-11a + 2a2 = 2

Solving for variable 'a'.

Reorder the terms:
-2 + -11a + 2a2 = 2 + -2

Combine like terms: 2 + -2 = 0
-2 + -11a + 2a2 = 0

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

Divide each side by '2'.
-1 + -5.5a + a2 = 0

Move the constant term to the right:

Add '1' to each side of the equation.
-1 + -5.5a + 1 + a2 = 0 + 1

Reorder the terms:
-1 + 1 + -5.5a + a2 = 0 + 1

Combine like terms: -1 + 1 = 0
0 + -5.5a + a2 = 0 + 1
-5.5a + a2 = 0 + 1

Combine like terms: 0 + 1 = 1
-5.5a + a2 = 1

The a term is -5.5a.  Take half its coefficient (-2.75).
Square it (7.5625) and add it to both sides.

Add '7.5625' to each side of the equation.
-5.5a + 7.5625 + a2 = 1 + 7.5625

Reorder the terms:
7.5625 + -5.5a + a2 = 1 + 7.5625

Combine like terms: 1 + 7.5625 = 8.5625
7.5625 + -5.5a + a2 = 8.5625

Factor a perfect square on the left side:
(a + -2.75)(a + -2.75) = 8.5625

Calculate the square root of the right side: 2.926174978

Break this problem into two subproblems by setting 
(a + -2.75) equal to 2.926174978 and -2.926174978.

Subproblem 1

a + -2.75 = 2.926174978 Simplifying a + -2.75 = 2.926174978 Reorder the terms: -2.75 + a = 2.926174978 Solving -2.75 + a = 2.926174978 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '2.75' to each side of the equation. -2.75 + 2.75 + a = 2.926174978 + 2.75 Combine like terms: -2.75 + 2.75 = 0.00 0.00 + a = 2.926174978 + 2.75 a = 2.926174978 + 2.75 Combine like terms: 2.926174978 + 2.75 = 5.676174978 a = 5.676174978 Simplifying a = 5.676174978

Subproblem 2

a + -2.75 = -2.926174978 Simplifying a + -2.75 = -2.926174978 Reorder the terms: -2.75 + a = -2.926174978 Solving -2.75 + a = -2.926174978 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '2.75' to each side of the equation. -2.75 + 2.75 + a = -2.926174978 + 2.75 Combine like terms: -2.75 + 2.75 = 0.00 0.00 + a = -2.926174978 + 2.75 a = -2.926174978 + 2.75 Combine like terms: -2.926174978 + 2.75 = -0.176174978 a = -0.176174978 Simplifying a = -0.176174978

Solution

The solution to the problem is based on the solutions from the subproblems. a = {5.676174978, -0.176174978}

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