Answer
mixed number form
1 7/13
Exact form
20/13
Step-by-step explanation:
28+72 put into distributive property is 4(7+18)
Answer:
21
Step-by-step explanation:
Answer:

Step-by-step explanation:
The given function is;

This is the same as;

Add and subtract the square of half the coefficient of x.

Observe that the first three terms is a perfect square trinomial.

The vertex form is 
The vertex (8,-64)