
(3√5-2)3 + 12(√5 — 3) = 45 — 12√5 + 4 + 12√5 — 36 = 13
Պատ․՝ 13

log38 + log310 / 2log32 + 1 = log3144 / log34 + log33 = log3144/log312 = log3122/log312 = 2log312/log312 = 2
Պատ․՝ 2

(a+b)2 — (a-b)2 / 4a2b2 = a2 + 2ab + b2 — (a2 — 2ab + b2) = a2 + 2ab + b2 — a2 + 2ab — b2 =4ab
4ab/4a262 = 1/ab
1 * 40/2 = 20
Պատ․՝ 20

9 — a2/5 / 3 + a1/5 = 32 — (a1/5)2 = (3 — a1/5)(3 + a1/5) = 3 — a1/5 = 3 — 5√32 = 3 — 2 = 1