Question

b^7-b^10/b^9-b^3
Плз посмогите

Answer 1

$frac{ {b}^{7} - {b}^{10} }{ {b}^{9} - {b}^{3} } = frac{ {b}^{7} (1 - {b}^{3}) }{ {b}^{3}( {b}^{6} - 1) } = frac{ - {b}^{4} ( {b}^{3} - 1)}{( {b}^{3} - 1)( {b}^{3} + 1)} = - frac{ {b}^{4} }{ {b}^{3} + 1}$