Question

(4b^2+9)/(2b+3) - 2b -3 = помогите решение

Answer 1

(4b^2-9)/(2b+3) - 2b - 3=((2b)^2 -3^2)/(2b+3) -2b-3 =(2b+3)(2b-3)/(2b+3)-2b-3=       =2b-3- (2b-3) =0

Answer 2

(4b^2+9)/(2b+3) - 2b - 3=((4b^2+9)-(2b+3)(2b+3))/(2b+3)=(4b^2+9-4b^2-12b-9)/(2b+3)=-12b/(2b+3)

Answer 3

спасибо