y^2-19y+78=0

Solution for y^2-19y+78=0 equation:

Simplifying
y2 + -19y + 78 = 0

Reorder the terms:
78 + -19y + y2 = 0

Solving
78 + -19y + y2 = 0

Solving for variable 'y'.

Factor a trinomial.
(6 + -1y)(13 + -1y) = 0

Subproblem 1
Set the factor '(6 + -1y)' equal to zero and attempt to solve:

Simplifying
6 + -1y = 0

Solving
6 + -1y = 0

Move all terms containing y to the left, all other terms to the right.

Add '-6' to each side of the equation.
6 + -6 + -1y = 0 + -6

Combine like terms: 6 + -6 = 0
0 + -1y = 0 + -6
-1y = 0 + -6

Combine like terms: 0 + -6 = -6
-1y = -6

Divide each side by '-1'.
y = 6

Simplifying
y = 6
Subproblem 2
Set the factor '(13 + -1y)' equal to zero and attempt to solve:

Simplifying
13 + -1y = 0

Solving
13 + -1y = 0

Move all terms containing y to the left, all other terms to the right.

Add '-13' to each side of the equation.
13 + -13 + -1y = 0 + -13

Combine like terms: 13 + -13 = 0
0 + -1y = 0 + -13
-1y = 0 + -13

Combine like terms: 0 + -13 = -13
-1y = -13

Divide each side by '-1'.
y = 13

Simplifying
y = 13
Solution
y = {6, 13}