Question

simplify the expression: t^2-81 / t-9

Answer 1

(t+9)(t-9)/(t-9)

=(t+9)

Answer 2

i know that the bottom will simplify to 1(t-9) ut i'm not sure about the numerator but i know it willhave (t-9)

Answer 3

ohhh ok i understand!

Answer 4

in the numerator use the identity (x^2-a^2)=(x+a)(x-a)
and 81=9^2