What is the polar form of the equation? (x + 2)2 + y2 = 4 O 72 = 4r sin e Op2 = 4r cos e Or(r + 4 sin 6) = 0 Or(r + 4 cos ) = 0​

hello from mrbilldoesmath!

answer:

25x^2 + 90x + 84

discussion:

mn(x) = m(n(x)) = m( 5x + 9) =

(5x + 9)^2 + 3 =>

25x^2 + 90x + 9^2 + 3 =

25x^2 + 90x + 84                 (as 9^2 = 9*9 = 81)

which is the second choice

regards,  

mrb

p.s.   i'll be on vacation from friday, dec 22 to jan 2, 2019. have a great new year!