Question

M² − m²n²
2m-2n
if m = 2 and n = -9

Answer 1

Explanation:

m² − m²n² = (2)² - (2)² (-9)²

= 4 -(4×18)

= 4-72

= -68

2m-2n = 2(2)-2(-9)

= 4+18

=32

Answer 2

Answer: for the first equation is 81 and the second equation is 22