guardianneangel guardianneangel

07-07-2017
Mathematics

contestada

PLEASE HELP ME GET THESE!

Factor: 81m^2 - 90m + 25

possible answers:

A. (9m + 5)^2
C. (9m - 5)^2
D. (9m + 5)(9m -5)

Respuesta :

Аноним Аноним

07-07-2017

note that sqrt81 = 9 and sqrt 25 = 5 or -5 and -90 = -45 - 45 so we can write

(9m - 5)(9m - 5)

= (9m - 5)^2

Its B

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