Please help me please and explain

Lower Quartile Explanation: Arrange the terms in ascending order

20, 22, 25, 28, 29, 30, 32, 33, 34

Take the lower half of the ascending set: 20, 22, 25, 28

Find the median of 20, 22, 25, 28: 23.5

Upper Quartile Explanation: Arrange the terms in ascending order

20, 22, 25, 28, 29, 30, 32, 33, 34

Take the upper half of the ascending set: 30, 32, 33, 34

Find the median of 30, 32, 33, 34: 32.5

Interquartile Explanation:

Compute the first quartile of the list: 23.5

Compute the third quartile of the list: 32.5

Compute the difference between 32.5 and 23.5: 9

a

step-by-step explanation:

answer:   x = 3 + √11     and     x = 3 - √11

step-by-step explanation:

x² - 6x + 9 = 11

(x - 3)² = 11

x - 3 = ±√11

    x = 3 ± √11

x = 3 + √11     and     x = 3 - √11