Question

(a+b)*(a-b)
please sAy quickly​

Answer 1

Answer:

${a}^{2} - {b}^{2}$

hope this helps you

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Answer 2

It is the identity

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

you have to learn this Identity i can derive this expression you can easily get this from that

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

Steps of doing

• First multiply like you easily simplify any equation
• Then subtract ab and ab it results to zero
• only a square minus b square are left