Answer:
Step-by-step explanation:
the number of rows = n
The number of trees per row = n + 10
n * (n + 10) = 551 Remove the brackets
n^2 + 10n = 551 Subtract 551 from both sides
n^2 + 10n - 551 = 0 This factors.
(n - 19)(n + 29) = 0
Note n + 29 is an extraneous (extra) root which does not work
n - 19 = 0
n = 19
There are 19 rows
Each row contains 19 trees.
