Question

3. Find the products using suitable identity:
(3y –2z) (3y + 2z)

Answer 1

Answer:

(3y –2z) (3y + 2z) = 9y^2 - 4z^2

Step-by-step explanation:

using identity

(a-b)(a+b) = a^2 - b^2

Answer 2

Step-by-step explanation:

=3y(3y+2z)–2z(3y+2z)

=9y²+6yz–6yz-4z²

=9y²–4z²

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