Question

упростите выражение ({6}{у^{2}-9}+{1}{3-у}){у2+6у+9}{5}

Answer 1

$(5 (9+6 y+y^2) (3-y+6 (-9+y^2))) = \=5 (y^2+6 y+9) (6 (y^2-9)-y+3) = 5(y+3)^2 (6(y-3)(y+3)-y+3))=5(y+3)^2 (y-3) (6(y+3)-1).$