x^2+1.1x+0.28=

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Solution for x^2+1.1x+0.28= equation:


Simplifying
x2 + 1.1x + 0.28 = 0

Reorder the terms:
0.28 + 1.1x + x2 = 0

Solving
0.28 + 1.1x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '-0.28' to each side of the equation.
0.28 + 1.1x + -0.28 + x2 = 0 + -0.28

Reorder the terms:
0.28 + -0.28 + 1.1x + x2 = 0 + -0.28

Combine like terms: 0.28 + -0.28 = 0.00
0.00 + 1.1x + x2 = 0 + -0.28
1.1x + x2 = 0 + -0.28

Combine like terms: 0 + -0.28 = -0.28
1.1x + x2 = -0.28

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 = -0.28 + 0.3025

Reorder the terms:
0.3025 + 1.1x + x2 = -0.28 + 0.3025

Combine like terms: -0.28 + 0.3025 = 0.0225
0.3025 + 1.1x + x2 = 0.0225

Factor a perfect square on the left side:
(x + 0.55)(x + 0.55) = 0.0225

Calculate the square root of the right side: 0.15

Break this problem into two subproblems by setting 
(x + 0.55) equal to 0.15 and -0.15.

Subproblem 1

x + 0.55 = 0.15 Simplifying x + 0.55 = 0.15 Reorder the terms: 0.55 + x = 0.15 Solving 0.55 + x = 0.15 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 = 0.15 + -0.55 Combine like terms: 0.55 + -0.55 = 0.00 0.00 + x = 0.15 + -0.55 x = 0.15 + -0.55 Combine like terms: 0.15 + -0.55 = -0.4 x = -0.4 Simplifying x = -0.4

Subproblem 2

x + 0.55 = -0.15 Simplifying x + 0.55 = -0.15 Reorder the terms: 0.55 + x = -0.15 Solving 0.55 + x = -0.15 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 = -0.15 + -0.55 Combine like terms: 0.55 + -0.55 = 0.00 0.00 + x = -0.15 + -0.55 x = -0.15 + -0.55 Combine like terms: -0.15 + -0.55 = -0.7 x = -0.7 Simplifying x = -0.7

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.4, -0.7}

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