Question

help needed

Answer 1

What do you need help with?

Answer 2

\[9w ^{2}=225\]

Answer 3

\[a ^{2}=144\]

Answer 4

\[2n ^{2}=72\]

Answer 5

225/9 = 25
9/9 = 1

9w^2 = 225
(9) w^2 = (9)25

divide both sides by (9)
w^2 = 25

25 = 5^5

w^2 = 5^2

w^2-5^2 = 0

now use 'differnce of squares'

Answer 6

\[\sqrt{i}\]

Answer 7

\[\sec^{2}\]

Answer 8

? are you posting all your questions in this one question?

you would get more help if you posted a new question in the thread for each problem you want help solving ^_^