Question

(5x+9)(5x-9) solve by using identity​

Answer 1

$\huge \underline \mathfrak \green {Answer :-}$

Identity used :

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

.

$(5x + 9)(5x - 9) \\ \\ = {(5x)}^{2} - {(9)}^{2} \\ \\ = 25 {x}^{2} - 81$

Answer 2

Answer:

check the attachment for the answer..

hope this helps you...