(x2 - 6x - 21) (x3 - 6x) + 80 = 0
x4 - 12x3 +15x2 + 126x + 80 = 0
(x-8)(x+2)(x2 - 6x - 5) = 0
x-8 = 0
x+2=0
x2 - 6x - 5 =0
x=8
x= - 2
x2 - 6x = 5 x2 - 6x + 9 = 14 (x-3)2 = 14 х = 3 + √14 или х-3= - <span>√14</span>
(8 × 10^2)^2 × (3 × 10^2) = (8 × 10 × 10) × (8 × 10 × 10) × (3 × 10 × 10) = 192000000
1) 8 × 10 = 80
2) 80 × 10 = 800
3) 8 × 10 = 80
4) 80 × 10 = 800
5) 3 × 10 = 30
6) 30 × 10 = 300
7) 800 × 800 = 640000
8) 640000 × 300 = 192000000
Ну во первых, 49,5 в нулевой степени!!!
1^15=1
sqrt(0,04)=0,2 и данное число в степени в степени -1=(1/5)^(-1)=5
49,5^0=1
итого 1-5+1=-3
!!!!!!!!!!!!!!!!!!!!!!!!!!