Решите уравнения: 1) 9y + 9 – y3 – y2 = 0 2) - вопрос №4192011993202322120 от bananchik1213 19.11.2022 18:58

Question

Алгебра: Решите уравнения: 1) 9y + 9 – y3 – y2 = 0 2) (3b – 2)2 – (b + 1) 2 = 0

bananchik1213 · Answer

9(y+1)-y²(y+1)=0(y+1)(9-y²)=0(y+1)(3-y)(3+y)=0y1= -1, y2= -3,  y3= 39b²-12b+4-b²-2b-1=08b²-14b+3=0D= 196-96=100b1= (14-10)/16= 1/4b2= (14+10)/16= 24/16= 3/2...