20х²-5х+24х-6=0
20х²+19х-6=0
а=20.b=19,c=-6
D=19²-4*20*(-6)=361+480=841
-19+29
x1= _______= 0.25
40
-19-29
x2= _________ = -1.2
40
Ответ:0,25;-1,2
Х=-0 ну ето просто у меня знака етого нету
= [(tg7π/24 - tgπ/24)(tg7π/24 + tgπ/24)] / [(1-tg7π/24*tgπ/24)(1+tg7π/24*tgπ/24)] = [(tg7π/24 - tgπ/24)/(1+tg7π/24*tgπ/24)] * [(tg7π/24 + tgπ/24) / (1-tg7π/24*tgπ/24)] = tg(7π/24 - π/24) * tg(7π/24 + π/24) = tgπ/4 * tgπ/3 = 1 * √3 = √3
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