Verified Answer :

olumideolawoyin

Answer:

\({a}^{2} - {b}^{2}\)

Step-by-step explanation:

(a + b) (a -b) Open the brackets by multiplication

= a (a -b) + b (a -b)

\(= {a}^{2} - ab + ab - {b}^{2}\)

\(= {a}^{2} + 0 - {b}^{2}\)

\(= {a}^{2} - {b}^{2}\)

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