Question

Factorise m² minus n²​

Answer 1

(m-n)(m+n)

check:

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

Answer 2

(m +n)(m -n)

Explanation:

Use the Identity (a² - b²) = (a +b)(a - b)

a = m and b = n

m² - n² = (m + n)(m - n)