
ա) 1/2a — 3 + 1/a — 1 = 2
a — 1 + 2a — 3 = 2(2a — 3)(a — 1)
a — 1 + 2a — 3 = 2(2a2 — 2a — 3a + 3)
a — 1 + 2a — 3 = a2 — 42a2 — 3a2 + 6
4a2 — 13a + 10 = 0
D = 169 — 160 = 9 > 0
a = 13 +- 3/3
a1 = 2
a2 = 18/8 = 5/4 = 1 1/4
բ) x/x — 3x + x — 8/x = 3
x/-2x + x — 8/x = 3
-1/2 + x — 8/x = 3
-x + 2x — 16 = 6x
-5x + 16 = 0
5x = 16
x = -16/5