5.6-1.5x-x^2=0

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Solution for 5.6-1.5x-x^2=0 equation:


Simplifying
5.6 + -1.5x + -1x2 = 0

Solving
5.6 + -1.5x + -1x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-5.6 + 1.5x + x2 = 0

Move the constant term to the right:

Add '5.6' to each side of the equation.
-5.6 + 1.5x + 5.6 + x2 = 0 + 5.6

Reorder the terms:
-5.6 + 5.6 + 1.5x + x2 = 0 + 5.6

Combine like terms: -5.6 + 5.6 = 0.0
0.0 + 1.5x + x2 = 0 + 5.6
1.5x + x2 = 0 + 5.6

Combine like terms: 0 + 5.6 = 5.6
1.5x + x2 = 5.6

The x term is 1.5x.  Take half its coefficient (0.75).
Square it (0.5625) and add it to both sides.

Add '0.5625' to each side of the equation.
1.5x + 0.5625 + x2 = 5.6 + 0.5625

Reorder the terms:
0.5625 + 1.5x + x2 = 5.6 + 0.5625

Combine like terms: 5.6 + 0.5625 = 6.1625
0.5625 + 1.5x + x2 = 6.1625

Factor a perfect square on the left side:
(x + 0.75)(x + 0.75) = 6.1625

Calculate the square root of the right side: 2.482438317

Break this problem into two subproblems by setting 
(x + 0.75) equal to 2.482438317 and -2.482438317.

Subproblem 1

x + 0.75 = 2.482438317 Simplifying x + 0.75 = 2.482438317 Reorder the terms: 0.75 + x = 2.482438317 Solving 0.75 + x = 2.482438317 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.75' to each side of the equation. 0.75 + -0.75 + x = 2.482438317 + -0.75 Combine like terms: 0.75 + -0.75 = 0.00 0.00 + x = 2.482438317 + -0.75 x = 2.482438317 + -0.75 Combine like terms: 2.482438317 + -0.75 = 1.732438317 x = 1.732438317 Simplifying x = 1.732438317

Subproblem 2

x + 0.75 = -2.482438317 Simplifying x + 0.75 = -2.482438317 Reorder the terms: 0.75 + x = -2.482438317 Solving 0.75 + x = -2.482438317 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.75' to each side of the equation. 0.75 + -0.75 + x = -2.482438317 + -0.75 Combine like terms: 0.75 + -0.75 = 0.00 0.00 + x = -2.482438317 + -0.75 x = -2.482438317 + -0.75 Combine like terms: -2.482438317 + -0.75 = -3.232438317 x = -3.232438317 Simplifying x = -3.232438317

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.732438317, -3.232438317}

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