Предмет: Алгебра, автор: Nickname13

Решить уравнения:
a)3x^2-21=0
б)9x^2+16-24x=0
в)-6a^2+8a-10=0
г)x-11x^2=0
д)x^2-0,04=0
е)15-x^2=0

Ответы

Автор ответа: BelieberDusia
0
1) 3x^2=21
x^2=7
2) 9x^2-24x+16=0
D=576-576=0
x=24/18=4/3
3) -6a^2+8a-10=0
D=64-240= -176
нет корней
4) x-11x^2=0
x=11x^2
нет корней
5) x^2-0,04=0
x^2=0,04
x=0,2
6) x^2=15
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