recall in a perfect square trinomial, the middle term is the tale-tell guy, we know the middle term is the product of 2 and the two other guys without the exponent, so in this case 6x = 2*√x² * √c.

First and third, second can still be simplified.
Answer:
because they are good ;)
Step-by-step explanation:
Monkeys like to eat bananas because these sweet fruits are found in the wild where primates live. Monkeys are omnivores that eat fruit, vegetables and foliage, not just bananas, according to the Great Ape Trust.
1st digit can be 1-9 which is 9 numbers
2nd digit can be 1-9 which is 9 numbers
3rd digit can be 4-7 which is 4 numbers.
Total combinations = 9 x 9 x 4 = 324
Substitute n with 5 and 6
(3x5)+5 = 20
(3x6)+5 = 23