Write the following conjugate binomial in standard form.
like this example.

(a) (x + 3) (x - 3)
= x( x - 3) + 3 (x - 3)
= x^2 - 3x + 3x -9
= x^ 2 -9

i have to answer b like this but i'm not sure if you have to repeat (x+5) twice or (x-5) considering the fact that it's written like this instead.

b) (x - 5 ) ( x + 5)

Which statement justifies why angle ebc measures 90?

Rob spent 25%, percent more time on his research project than he had planned. he spent an extra h hours on the project. which of the following expressions could represent the number of hours rob actually spent on the project? two answers

Apoll is being conducted at a mall nothingto obtain a sample of the population of an entire country. what is the frame for this type of​ sampling? who would be excluded from the survey and how might this affect the results of the​ survey? what is the frame for this type of​ sampling? a. the frame is people who need new clothes. b. the frame is people who shop at the mall. c. the frame is people who like to shop. d. the frame is the entire population of the country. who would be excluded from the survey and how might this affect the results of the​ survey? a. any person that does not need new clothes is excluded. this could result in sampling bias due to undercoverage. b. any person who does not shop at the mall is excluded. this could result in sampling bias due to undercoverage. c. any person who does not shop at the mall is excluded. this could result in nonresponse bias due to people not participating in the poll. d. there is nobody that is being excluded from the survey.