x^2-1.5x-104.5=0

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Solution for x^2-1.5x-104.5=0 equation:


Simplifying
x2 + -1.5x + -104.5 = 0

Reorder the terms:
-104.5 + -1.5x + x2 = 0

Solving
-104.5 + -1.5x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '104.5' to each side of the equation.
-104.5 + -1.5x + 104.5 + x2 = 0 + 104.5

Reorder the terms:
-104.5 + 104.5 + -1.5x + x2 = 0 + 104.5

Combine like terms: -104.5 + 104.5 = 0.0
0.0 + -1.5x + x2 = 0 + 104.5
-1.5x + x2 = 0 + 104.5

Combine like terms: 0 + 104.5 = 104.5
-1.5x + x2 = 104.5

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 = 104.5 + 0.5625

Reorder the terms:
0.5625 + -1.5x + x2 = 104.5 + 0.5625

Combine like terms: 104.5 + 0.5625 = 105.0625
0.5625 + -1.5x + x2 = 105.0625

Factor a perfect square on the left side:
(x + -0.75)(x + -0.75) = 105.0625

Calculate the square root of the right side: 10.25

Break this problem into two subproblems by setting 
(x + -0.75) equal to 10.25 and -10.25.

Subproblem 1

x + -0.75 = 10.25 Simplifying x + -0.75 = 10.25 Reorder the terms: -0.75 + x = 10.25 Solving -0.75 + x = 10.25 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 = 10.25 + 0.75 Combine like terms: -0.75 + 0.75 = 0.00 0.00 + x = 10.25 + 0.75 x = 10.25 + 0.75 Combine like terms: 10.25 + 0.75 = 11 x = 11 Simplifying x = 11

Subproblem 2

x + -0.75 = -10.25 Simplifying x + -0.75 = -10.25 Reorder the terms: -0.75 + x = -10.25 Solving -0.75 + x = -10.25 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 = -10.25 + 0.75 Combine like terms: -0.75 + 0.75 = 0.00 0.00 + x = -10.25 + 0.75 x = -10.25 + 0.75 Combine like terms: -10.25 + 0.75 = -9.5 x = -9.5 Simplifying x = -9.5

Solution

The solution to the problem is based on the solutions from the subproblems. x = {11, -9.5}

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