x^2-1.1x-2.76=0

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Solution for x^2-1.1x-2.76=0 equation:


Simplifying
x2 + -1.1x + -2.76 = 0

Reorder the terms:
-2.76 + -1.1x + x2 = 0

Solving
-2.76 + -1.1x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '2.76' to each side of the equation.
-2.76 + -1.1x + 2.76 + x2 = 0 + 2.76

Reorder the terms:
-2.76 + 2.76 + -1.1x + x2 = 0 + 2.76

Combine like terms: -2.76 + 2.76 = 0.00
0.00 + -1.1x + x2 = 0 + 2.76
-1.1x + x2 = 0 + 2.76

Combine like terms: 0 + 2.76 = 2.76
-1.1x + x2 = 2.76

The x term is -1.1x.  Take half its coefficient (-0.55).
Square it (0.3025) and add it to both sides.

Add '0.3025' to each side of the equation.
-1.1x + 0.3025 + x2 = 2.76 + 0.3025

Reorder the terms:
0.3025 + -1.1x + x2 = 2.76 + 0.3025

Combine like terms: 2.76 + 0.3025 = 3.0625
0.3025 + -1.1x + x2 = 3.0625

Factor a perfect square on the left side:
(x + -0.55)(x + -0.55) = 3.0625

Calculate the square root of the right side: 1.75

Break this problem into two subproblems by setting 
(x + -0.55) equal to 1.75 and -1.75.

Subproblem 1

x + -0.55 = 1.75 Simplifying x + -0.55 = 1.75 Reorder the terms: -0.55 + x = 1.75 Solving -0.55 + x = 1.75 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.55' to each side of the equation. -0.55 + 0.55 + x = 1.75 + 0.55 Combine like terms: -0.55 + 0.55 = 0.00 0.00 + x = 1.75 + 0.55 x = 1.75 + 0.55 Combine like terms: 1.75 + 0.55 = 2.3 x = 2.3 Simplifying x = 2.3

Subproblem 2

x + -0.55 = -1.75 Simplifying x + -0.55 = -1.75 Reorder the terms: -0.55 + x = -1.75 Solving -0.55 + x = -1.75 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.55' to each side of the equation. -0.55 + 0.55 + x = -1.75 + 0.55 Combine like terms: -0.55 + 0.55 = 0.00 0.00 + x = -1.75 + 0.55 x = -1.75 + 0.55 Combine like terms: -1.75 + 0.55 = -1.2 x = -1.2 Simplifying x = -1.2

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.3, -1.2}

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