Question

can someone give me a step by step answer on : (m-n)(m+n)

Answer 1

simplifying it

Answer 2

it is m^2 - n^2

Answer 3

m^2-n^2

Answer 4

u used the distributive property?

Answer 5

use the distributive property twice; yes

Answer 6

Working can be shown as follows

m(m+n) -n(m+n) = m^2 +mn -mn -n^2 = m^2 - n^2

Answer 7

m*m=m2
m*n=mn
-m*n=-mn so it cancels
-n*n=-n^2
final answer is m^2-n^2

Answer 8

or simply mulitply like normal numbers would:

m -n
m +n
-------
m^2 -mn
+mn -n^2
--------------
m^2 -n^2

Answer 9

distribute:
(m−n)(m+n)=m^2+mn−mn−n^2
then simplifying
(m−n)(m+n)=m^2+mn−mn−n^2 = m^2-n^2

because: mn-mn=0

Answer 10

that's as step by step as i can think to make it... plus smurfy's comments.