Question

expand (5x+1/5x)(5x-1/5x)​

Answer 1

$\huge {\underline {\underline {\sf {Solution}}}}$

$(5x + 1/5x)(5x - 1/5x)$

[Using identity, (a + b)(a - b) = a² - b²]

$= (5x)² - (1/5x)²$

$= 25x² - 1/25x²$