Question

121a2-225b2

пжж срочноо нужнооо

Answer 1

$\displaystyle {121a}^{2} - 225 {b}^{2} = (11a - 15b)(11a + 15b).$

Answer 2

Ответ:

$121a^2-225b^2=(11a)^2-(15b)^2=\ \ \ \ \ \ \boxed{\ a^2-b^2=(a-b)(a+b)\ }\\\\=(11a-15b)(11a+15b)$