Question

SPECIAL POLYNOMIAL PRODUCTS
please write out these expressions in the pattern
1. (m-n)(m+n)
2. (z-3)(z+3)

Answer 1

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

2) (z-3)(z+3)
= z^2+3z-3z-9
= z^2-9