ММ
Мария Максимова
Ответ
(x^2+13x+40) \ (x^2-25) = =>
__ x^2+13x+40=0
x1 + x2 = -13
x1 * x2 = 40
x1 = -8
x2 = -5 =>
x^2+13x+40 = (x+8)(x+5)
__ x^2 - 25 = (x+5)(x-5)
=> (x^2+13x+40) \ (x^2-25) =
= (x+8)(x+5) \ (x+5)(x-5) =
= (x+8) \ (x-5)