2х²+6х-1=0
D=36+8=44=(2√11)²
х=(-6+2√11)/4=(√11-3)/2
х=(-6-2√11)/4=(-√11-3)/2
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2х²+6х-1=0
D=36+8=44=(2√11)²
х=(-6+2√11)/4=(√11-3)/2
х=(-6-2√11)/4=(-√11-3)/2