Question

решите выражение (6/у2-9 + 1/3-у)*у2+6у+9/5

Answer 1

(6/(y^2-9)+1/(3-y)) *(y^2+6y+9)/5 =(-6/((3-y)(3+y))+1/(3-y)) *(y+3)^2/5 = ((-6+3+y)/((3-y)(3+y))*(y+3)^2/5 =(-(3-y)/((3-y)(3+y))*(y+3)^2/5 =-(y+3)/5