Question

PLZ help with this it should be super easy
plz and thx

Answer 1

-m²+81

Explanation:

Hello There!

9x-m=-9m

9x9=81

mx-m=-m²

9xm=9m

9m-9m=0

we would be left with

-m²+81

Answer 2

81 - m²

Explanation:

Use (a + b)(a - b) = a² - b² identity

(9 + m)(-m + 9) = (9 + m)(9 - m)

= 9² - m²

= 81 - m²