Alot of 50m by 36 m. a house is 31m by 9m built on the lot how much space is left over?

Find the area of the lot and the house and subtract the area of the house from the area of the lot,

Lot = 50 x 36 = 1800 square m.

House = 31 x 9 = 279 square m.

Left over = 1800 - 279 = 1,521 square m.

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!