Question

find the product of (a-3)(a+3) using appropriate identities​

Answer 1

Step-by-step explanation:

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

This is the identity we are going to use

$(a - 3)(a + 3) = a {}^{2} - 3 {}^{2} = a {}^{2} - 9$

This is the answer we get by applying above identity.