Вопрос школьника по предмету Алгебра
Разложите многочлен на множитель:
(с-2)(с+3)+с^2
Ответ учителя по предмету Алгебра
(с-2)(с+3)+с²=с²+3с-2с-6+с²=
2с²+с-6
D=1+4*2*6=1+48=49
√D=7
c₁=(-1-7)/4=-2
c₂=(-1+7)/4=3/2
2с²+с-6=2(c+2)(c-3/2)=
(c+2)(2c-3)
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