Ответ:

(2х-корень из х — 3=0)^2

 4x^2-х-3=0D = b2 — 4acD = 1 + 48 = 49 = 7^2

x1,2 = -b ± √D/2ax1 = 1 + 7/8 = 8/8 = 1×2 = 1 — 7/8 = — 6/8 = — 3/4Ответ: x1 = 1 ; x2 = — 3/4