Question

решите оч надо пжлст

Answer 1

4) S = ab
a = b + 14
b(b + 14) = 120
b^2 + 14b - 120 = 0
D = 196 + 4*120 = 196 + 480 = 676
b = (-14 + 26)/2 = 12/2 = 6
a = 6 + 14 = 20
Ответ 6 и 20
5) 1 и 3
8) x^2 - 4x<0
____0///////////4_____
Ответ х ∈ (0; 4)