Question

Using an identity (a + b) (a– b)= a2 – b2

find (2y + 3) (2y - 3)​

Answer 1

Answer:

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

$(2y + 3)(2y - 3) = (2y) { }^{2} - (3) {}^{2} \\ = 4y { }^{2} - 6$