We need the parenthesis around 15 + 3
Answer is C.
(15 + 3) / 3 = 6
18 / 3 = 6
6 = 6
So the answer is C :)
Answer:

Step-by-step explanation:

20 can be written as a product of 4 and 5.

4 is a perfect square.

Square root of 4 is 2.

Answer:
Step-by-step explanation:
Area is height time width, or in this case, 3(2x^2+3x+5), which is 6x^2+9x+15.