Решить уравнение и объяснить. х квадрате + 3х = 10
BoGdAn548965
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08.09.2019 19:40
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приводим к стандартному виду квадратного уравнения
х²+3х-10=0
d=b²-4ac=3²-4*1*(-10)=9+40=49
х1=(-b-√d)/2a=(-3-7)/2=-5
x2=(-b+√d)/2a=(-3+7)/2=2