\(m^2-16+n^2-2mn\)
\(=n^2-2mn+m^2-16\)
\(=\left(n-m\right)^2-16\)
\(=\left(n-m-4\right)\left(n-m+4\right)\)
m2 - 16 + n2 - 2mn
= m2 - 2mn + n2 - 16
= (m - n)2 - 42
= (m - n - 4)(m - n + 4)
m2 -16 +n2 - 2mn = (m2 - 2mn + n2) -16
=( m - n )2 - 42
= (m- n- 4)(m - n + 4)
\(m^2-16+n^2-2mn\)
= \(m^2-2mn+n^2-16\)
= \(\left(m-n\right)^2-16\)
= \(\left(m-n\right)^2-4^2\)
= \(\left(m-n+4\right)\left(m-n-4\right)\)
Học Tốt Nhá !!
m^2 - 16 + n^2 - 2mn
= ( m^2 - 2mn + n^2 ) - 16
= ( m - n ) ^ 2 - 4 ^ 2
= ( m - n - 4 ) ( m - n + 4)