Standard form : -5a+75
leading co is: -5
72 chicken and 4ó3 dogs come to 535 animals altogether.
The factored form of the expression
is 
The expression x^2 + 9 has no real roots hence cannot be factored
Quadratic equations are equations with a degree of 2.
Given the quadratic function 
For the function 

Using the difference of two squares:

For the expression x^2 + 9
The expression x^2 + 9 has no real roots hence cannot be factored
Learn more on factorization here: brainly.com/question/20293447
Answer:
the last one
Step-by-step explanation: