3s^2-16s+21=0

Solution for 3s^2-16s+21=0 equation:

Simplifying
3s2 + -16s + 21 = 0

Reorder the terms:
21 + -16s + 3s2 = 0

Solving
21 + -16s + 3s2 = 0

Solving for variable 's'.

Factor a trinomial.
(7 + -3s)(3 + -1s) = 0

Subproblem 1
Set the factor '(7 + -3s)' equal to zero and attempt to solve:

Simplifying
7 + -3s = 0

Solving
7 + -3s = 0

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

Add '-7' to each side of the equation.
7 + -7 + -3s = 0 + -7

Combine like terms: 7 + -7 = 0
0 + -3s = 0 + -7
-3s = 0 + -7

Combine like terms: 0 + -7 = -7
-3s = -7

Divide each side by '-3'.
s = 2.333333333

Simplifying
s = 2.333333333
Subproblem 2
Set the factor '(3 + -1s)' equal to zero and attempt to solve:

Simplifying
3 + -1s = 0

Solving
3 + -1s = 0

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

Add '-3' to each side of the equation.
3 + -3 + -1s = 0 + -3

Combine like terms: 3 + -3 = 0
0 + -1s = 0 + -3
-1s = 0 + -3

Combine like terms: 0 + -3 = -3
-1s = -3

Divide each side by '-1'.
s = 3

Simplifying
s = 3
Solution
s = {2.333333333, 3}