Question

сократить дробь в) 3a-3b a2-b2

Answer 1

( 3A - 3B ) / ( A^2 - B^2 ) = ( 3 * ( A - B )) / ( A - B)*( A + B ) =
= 3 / ( A + B )

Answer 2

$frac{3a-3b}{ a^{2} - b^{2} } = frac{3(a-b)}{(a-b)(a+b)}= frac{3}{a+b}$