Answer: $4
Step-by-step explanation:
Answer:
21/10 or 2.1
2
±sqrt(7) = r
21 = 3r^2
Divide each side by 3
21/3 = 3r^2/3
7 = r^2
Take the square root of each side
±sqrt(7) = sqrt(r^2)
first one y=(X-3)(X+1)(X+5)
