Question

Completely factor the following expression:
49y²– 81z²

Answer 1

(7y)^2-(9z)^2

Answer 2

use \(a^2-b^2=(a+b)(a-b)\) with \(a=7y,b=9z\)

Answer 3

a^2-b^2=(a+b)(a-b)

Answer 4

(7y+9z)(7y-9z)

Answer 5

ok @sharron482

Answer 6

thank you