Помогите решить плиз !!!!
1) 2y+10 = 2(y+5) = -2(y+5) = -2 25-y² -(y²-25) (y-5)(y+5) y-5 2) 4 - 2 - 2 = 4(y-5) - 2y - 2y = 4y-20 -4y = -20 = 20 y y-5 y-5 y(y-5) y(y-5) y²-5y 5y-y²