Question

!!!!!!!!!!!!!СРОЧНО!!!!!!!!!!!!!!!!!
подробно пожалуйста

Answer 1

Решение во вложении.

Answer 2

7y²+9y+2>0
7y²+9y+2 = 0
D = b²-4ac = 81 - 4*7*2 = 25
√D = 5
x₁ = (-9-5)/14 = -1
x₂ = (-9+5)/14 = -2/7

___+____-1___ - ____ -2/7______ +________

x∈ (-∞;-1)∪ (-2/7;+∞)