Question

Сократите дробь:

( 5x + 3)^2 − ( 5x − 3)^2 /x

Answer 1

$frac{(5x+3)^2-(5x-3)^2}{x}=\\frac{25x^2+30x+9-25x^2+30x-9}{x}=\\frac{60x}{x}=60$