Question

using
the identity
(x+a)(x+b) = x²+(a+b)x+ab
(m-n)(m-n)​

Answer 1

Answer:

m²-n²-2mn

Step-by-step explanation:

(m-n) (m-n) multiply both

m²-mn-n²-mn

m²-n²-mn-mn (- / - = +)

m²-n²-2mn