What is expand (m-n-1)(m-n+1) ?

The solution to expand (m-n-1)(m-n+1) is m^2-2mn+n^2-1

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expand (m-n-1)(m-n+1)

expand

(m - n - 1) (m - n + 1)

m^{2} - 2 mn + n^{2} - 1

Solution steps

(m - n - 1) (m - n + 1)

Distribute parentheses

= mm + m (- n) + m \cdot 1 - nm - n (- n) - n \cdot 1 - 1 \cdot m - 1 \cdot (- n) - 1 \cdot 1

Simplify

mm + m (- n) + m \cdot 1 - nm - n (- n) - n \cdot 1 - 1 \cdot m - 1 \cdot (- n) - 1 \cdot 1 : m^{2} - 2 mn + n^{2} - 1

= m^{2} - 2 mn + n^{2} - 1

(- 5) + (- 13)

20 + a^{2} - 21

(4 x + 3) (x^{2} - 2 x + 4)

What is expand (m-n-1)(m-n+1) ?
The solution to expand (m-n-1)(m-n+1) is m^2-2mn+n^2-1