Найдите разность дробь (28х^2/7х-7)-4х

Question

Найдите разность дробь (28х^2/7х-7)-4х

Answer 1

( 28X^2 / 7X - 7 ) - 4X = ( 28X^2 - 4X*( 7X - 7 )) / ( 7X - 7 ) = ( 28X^2 - 28X^2 + 28X ) / ( 7X - 7 ) = 28X / ( 7X - 7 )