Answer:
13)5m-10
14)8y+16
15)-3m-12
16)a²+3a
17)h²-2h
18)2m²+8m
19)-2z+16
20)-4x²+40x
21) 12x and 60
22)x and 4
Step-by-step explanation:
we have
This is a vertical parabola open downward (the leading coefficient is negative)
The vertex is a maximum
The vertex is the point (h,k)
The range of the function is the interval (-∞,k]
so
Convert the quadratic equation in vertex form
Factor -1 leading coefficient
Complete the square
Rewrite as perfect squares
The vertex is the point (-1,4)
therefore
The range is