Because zero is neither positive nor negative, the term nonnegative is sometimes used to refer to a number that is either positive or zero, while nonpositive is used to refer to a number that is either negative or zero. Zero is a neutral number.
Answer:
Factor the numerator and denominator and cancel the common factors.
20
Step-by-step explanation:
Hey there!

We can first factor out the 4 (bring it outside the parenthesis)

Now have a closer look between the parenthesis, because this expression can be factored as well. We're looking for two different numbers with a product of -6 and a sum of 5. Hence, we find the numbers 6 and -1

~ Hope this helps you!
This is how i would do it divide 81 by 2 then take 21 of one side and add it to the other side
-is a positive parabola
-has two roots at x= 1 and x= 5
- has a y-intercept at y=5
- has a minimum at (3, -4)
- axis of symmetry is x=3