5x^2-19x+16=0

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Solution for 5x^2-19x+16=0 equation:


Simplifying
5x2 + -19x + 16 = 0

Reorder the terms:
16 + -19x + 5x2 = 0

Solving
16 + -19x + 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 + -3.8x + x2 = 0

Move the constant term to the right:

Add '-3.2' to each side of the equation.
3.2 + -3.8x + -3.2 + x2 = 0 + -3.2

Reorder the terms:
3.2 + -3.2 + -3.8x + x2 = 0 + -3.2

Combine like terms: 3.2 + -3.2 = 0.0
0.0 + -3.8x + x2 = 0 + -3.2
-3.8x + x2 = 0 + -3.2

Combine like terms: 0 + -3.2 = -3.2
-3.8x + x2 = -3.2

The x term is -3.8x.  Take half its coefficient (-1.9).
Square it (3.61) and add it to both sides.

Add '3.61' to each side of the equation.
-3.8x + 3.61 + x2 = -3.2 + 3.61

Reorder the terms:
3.61 + -3.8x + x2 = -3.2 + 3.61

Combine like terms: -3.2 + 3.61 = 0.41
3.61 + -3.8x + x2 = 0.41

Factor a perfect square on the left side:
(x + -1.9)(x + -1.9) = 0.41

Calculate the square root of the right side: 0.640312424

Break this problem into two subproblems by setting 
(x + -1.9) equal to 0.640312424 and -0.640312424.

Subproblem 1

x + -1.9 = 0.640312424 Simplifying x + -1.9 = 0.640312424 Reorder the terms: -1.9 + x = 0.640312424 Solving -1.9 + x = 0.640312424 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.9' to each side of the equation. -1.9 + 1.9 + x = 0.640312424 + 1.9 Combine like terms: -1.9 + 1.9 = 0.0 0.0 + x = 0.640312424 + 1.9 x = 0.640312424 + 1.9 Combine like terms: 0.640312424 + 1.9 = 2.540312424 x = 2.540312424 Simplifying x = 2.540312424

Subproblem 2

x + -1.9 = -0.640312424 Simplifying x + -1.9 = -0.640312424 Reorder the terms: -1.9 + x = -0.640312424 Solving -1.9 + x = -0.640312424 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.9' to each side of the equation. -1.9 + 1.9 + x = -0.640312424 + 1.9 Combine like terms: -1.9 + 1.9 = 0.0 0.0 + x = -0.640312424 + 1.9 x = -0.640312424 + 1.9 Combine like terms: -0.640312424 + 1.9 = 1.259687576 x = 1.259687576 Simplifying x = 1.259687576

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.540312424, 1.259687576}

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