Question

Помогите плиз срочно(!!!!

Answer 1

1) 27⁴=(3³)⁴=3¹²

9⁵=(3²)⁵=3¹⁰

27⁴-9⁵=3¹²-3¹⁰= 3¹⁰(3²-1)=3¹⁰(3-1)(3+1)=3¹⁰×2×4=3¹⁰×8

2)х²-9х+18= 0

Д=81 - 4*18 = 81 - 7 = 9
х1= 9 +3 / 2 = 6
х2 = 9 - 3 /2 = 3

(х-6)(х-3)