Answer:
8
sqrt(7)
1/2
20
Step-by-step explanation:
4sqrt(2) * sqrt(2) = 4 * sqrt(4) = 4 * 2 = 8
3sqrt(7) - 2sqrt(7) = sqrt(7)
sqrt(7)/(2sqrt(7)) = 1/2
2sqrt(5) * 2sqrt(5) = 2 * 2 * sqrt(25) = 4 * 5 = 20
