5x^2-27x+16=0

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Solution for 5x^2-27x+16=0 equation:


Simplifying
5x2 + -27x + 16 = 0

Reorder the terms:
16 + -27x + 5x2 = 0

Solving
16 + -27x + 5x2 = 0

Solving for variable 'x'.

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

Divide each side by '5'.
3.2 + -5.4x + x2 = 0

Move the constant term to the right:

Add '-3.2' to each side of the equation.
3.2 + -5.4x + -3.2 + x2 = 0 + -3.2

Reorder the terms:
3.2 + -3.2 + -5.4x + x2 = 0 + -3.2

Combine like terms: 3.2 + -3.2 = 0.0
0.0 + -5.4x + x2 = 0 + -3.2
-5.4x + x2 = 0 + -3.2

Combine like terms: 0 + -3.2 = -3.2
-5.4x + x2 = -3.2

The x term is -5.4x.  Take half its coefficient (-2.7).
Square it (7.29) and add it to both sides.

Add '7.29' to each side of the equation.
-5.4x + 7.29 + x2 = -3.2 + 7.29

Reorder the terms:
7.29 + -5.4x + x2 = -3.2 + 7.29

Combine like terms: -3.2 + 7.29 = 4.09
7.29 + -5.4x + x2 = 4.09

Factor a perfect square on the left side:
(x + -2.7)(x + -2.7) = 4.09

Calculate the square root of the right side: 2.022374842

Break this problem into two subproblems by setting 
(x + -2.7) equal to 2.022374842 and -2.022374842.

Subproblem 1

x + -2.7 = 2.022374842 Simplifying x + -2.7 = 2.022374842 Reorder the terms: -2.7 + x = 2.022374842 Solving -2.7 + x = 2.022374842 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.7' to each side of the equation. -2.7 + 2.7 + x = 2.022374842 + 2.7 Combine like terms: -2.7 + 2.7 = 0.0 0.0 + x = 2.022374842 + 2.7 x = 2.022374842 + 2.7 Combine like terms: 2.022374842 + 2.7 = 4.722374842 x = 4.722374842 Simplifying x = 4.722374842

Subproblem 2

x + -2.7 = -2.022374842 Simplifying x + -2.7 = -2.022374842 Reorder the terms: -2.7 + x = -2.022374842 Solving -2.7 + x = -2.022374842 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.7' to each side of the equation. -2.7 + 2.7 + x = -2.022374842 + 2.7 Combine like terms: -2.7 + 2.7 = 0.0 0.0 + x = -2.022374842 + 2.7 x = -2.022374842 + 2.7 Combine like terms: -2.022374842 + 2.7 = 0.677625158 x = 0.677625158 Simplifying x = 0.677625158

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.722374842, 0.677625158}

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