Question

(ii) Find product of following by expanding.
(a)(2s + 11)(2s - 11)
(b)(8 – 3v)(8 + 3v)​

Answer 1

1) (2s+11)(2s-11)

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

2s^2-11^2

4s^2- 121

2)(8-3v)(8+3v)

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

8^2-3v^2

64-9v^2

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