Question

(5x + 3) (5x - 3) =____
​

Answer 1

$\huge\pink{\boxed{\green {\mathbb{\overbrace {\underbrace{\fcolorbox{red}{aqua}{\underline{\pink{ Solution }}}}}}}}}$

$= (5x + 3)(5x - 3)$

$= {(5x)}^{2} - {(3x)}^{2}$

$={25x}^{2} - {9x}^{2}$

Hence there's your answer!

Formula applied: a²-b²=(a+b)(a-b)