x^2-10.5x+27=0

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Solution for x^2-10.5x+27=0 equation:


Simplifying
x2 + -10.5x + 27 = 0

Reorder the terms:
27 + -10.5x + x2 = 0

Solving
27 + -10.5x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '-27' to each side of the equation.
27 + -10.5x + -27 + x2 = 0 + -27

Reorder the terms:
27 + -27 + -10.5x + x2 = 0 + -27

Combine like terms: 27 + -27 = 0
0 + -10.5x + x2 = 0 + -27
-10.5x + x2 = 0 + -27

Combine like terms: 0 + -27 = -27
-10.5x + x2 = -27

The x term is -10.5x.  Take half its coefficient (-5.25).
Square it (27.5625) and add it to both sides.

Add '27.5625' to each side of the equation.
-10.5x + 27.5625 + x2 = -27 + 27.5625

Reorder the terms:
27.5625 + -10.5x + x2 = -27 + 27.5625

Combine like terms: -27 + 27.5625 = 0.5625
27.5625 + -10.5x + x2 = 0.5625

Factor a perfect square on the left side:
(x + -5.25)(x + -5.25) = 0.5625

Calculate the square root of the right side: 0.75

Break this problem into two subproblems by setting 
(x + -5.25) equal to 0.75 and -0.75.

Subproblem 1

x + -5.25 = 0.75 Simplifying x + -5.25 = 0.75 Reorder the terms: -5.25 + x = 0.75 Solving -5.25 + x = 0.75 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5.25' to each side of the equation. -5.25 + 5.25 + x = 0.75 + 5.25 Combine like terms: -5.25 + 5.25 = 0.00 0.00 + x = 0.75 + 5.25 x = 0.75 + 5.25 Combine like terms: 0.75 + 5.25 = 6 x = 6 Simplifying x = 6

Subproblem 2

x + -5.25 = -0.75 Simplifying x + -5.25 = -0.75 Reorder the terms: -5.25 + x = -0.75 Solving -5.25 + x = -0.75 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5.25' to each side of the equation. -5.25 + 5.25 + x = -0.75 + 5.25 Combine like terms: -5.25 + 5.25 = 0.00 0.00 + x = -0.75 + 5.25 x = -0.75 + 5.25 Combine like terms: -0.75 + 5.25 = 4.5 x = 4.5 Simplifying x = 4.5

Solution

The solution to the problem is based on the solutions from the subproblems. x = {6, 4.5}

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