Answer:
The answer for question 2 is 20x
The answer for question 3 is 80x.
Explanation:
the factors of the first question are:
(2x+5)(2x+5)
4 is perfect square root of 2.
25 is perfect square root of 5.
When you foil these factors, you have multiply 2x*5 which gives you 10x.
You do it one more time and get 10x. Add the both 10x together and get 20x.
the factors of the second question are:
(5x+8)(5x+8)
Since 25 is a perfect square root of 5, 5 would be one of our factors. 64 is a perfect square of 8. 8*5x is 40x and you add another 40x which would give you 80x.