Решение задач

x^2 — 16 <

x^2 — 4x — 5 < 0

x + y = 4, 2x + 2y = 8

x + 15/4 — 21/(x+2) = 2

a^2 — 2x = 0

x/(x+5)-25/(x^2+5x)=0

y = 3 / log_3(x — 6)

f(x) = -x^2 — 4, x in [0, 2]

f(x) = (6x + 7)/(2 — x)

g(x) = -4/x

log_2 4 — log_2 2.5