.5x^2+2.75x=1.5

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Solution for .5x^2+2.75x=1.5 equation:


Simplifying
0.5x2 + 2.75x = 1.5

Reorder the terms:
2.75x + 0.5x2 = 1.5

Solving
2.75x + 0.5x2 = 1.5

Solving for variable 'x'.

Reorder the terms:
-1.5 + 2.75x + 0.5x2 = 1.5 + -1.5

Combine like terms: 1.5 + -1.5 = 0.0
-1.5 + 2.75x + 0.5x2 = 0.0

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

Divide each side by '0.5'.
-3 + 5.5x + x2 = 0

Move the constant term to the right:

Add '3' to each side of the equation.
-3 + 5.5x + 3 + x2 = 0 + 3

Reorder the terms:
-3 + 3 + 5.5x + x2 = 0 + 3

Combine like terms: -3 + 3 = 0
0 + 5.5x + x2 = 0 + 3
5.5x + x2 = 0 + 3

Combine like terms: 0 + 3 = 3
5.5x + x2 = 3

The x term is 5.5x.  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.
5.5x + 7.5625 + x2 = 3 + 7.5625

Reorder the terms:
7.5625 + 5.5x + x2 = 3 + 7.5625

Combine like terms: 3 + 7.5625 = 10.5625
7.5625 + 5.5x + x2 = 10.5625

Factor a perfect square on the left side:
(x + 2.75)(x + 2.75) = 10.5625

Calculate the square root of the right side: 3.25

Break this problem into two subproblems by setting 
(x + 2.75) equal to 3.25 and -3.25.

Subproblem 1

x + 2.75 = 3.25 Simplifying x + 2.75 = 3.25 Reorder the terms: 2.75 + x = 3.25 Solving 2.75 + x = 3.25 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.75' to each side of the equation. 2.75 + -2.75 + x = 3.25 + -2.75 Combine like terms: 2.75 + -2.75 = 0.00 0.00 + x = 3.25 + -2.75 x = 3.25 + -2.75 Combine like terms: 3.25 + -2.75 = 0.5 x = 0.5 Simplifying x = 0.5

Subproblem 2

x + 2.75 = -3.25 Simplifying x + 2.75 = -3.25 Reorder the terms: 2.75 + x = -3.25 Solving 2.75 + x = -3.25 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.75' to each side of the equation. 2.75 + -2.75 + x = -3.25 + -2.75 Combine like terms: 2.75 + -2.75 = 0.00 0.00 + x = -3.25 + -2.75 x = -3.25 + -2.75 Combine like terms: -3.25 + -2.75 = -6 x = -6 Simplifying x = -6

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.5, -6}

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