Question

4a^2-9=?
answer fast​

Answer 1

Answer:

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

$\: \: \: \: 4 {a}^{2} - 9 \\ = {(2a)}^{2} - {(3)}^{2} \\ = (2a + 3)(2a - 3)$