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Vika4443
@Vika4443
July 2022
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Алгебра 9 класс. Даю 15 баллов.
Задания 8-10.
Помогите
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nek0100
8)
3a + (4-2a^2)/a = (3a^2 + 4-2a^2)/a = (a^2+4)/a
9)
x^2+7x-30=0
x^2+10x-3x-30=0
x(x+10)-3(x+10)=0
(x+10)(x-3)=0
x= -10 x=3
10)
x+2y=4 *2 2x+4y=8
2x+y=2 2x+y=2
3y=6
y=2
x=0
1 votes
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Answers & Comments
3a + (4-2a^2)/a = (3a^2 + 4-2a^2)/a = (a^2+4)/a
9)
x^2+7x-30=0
x^2+10x-3x-30=0
x(x+10)-3(x+10)=0
(x+10)(x-3)=0
x= -10 x=3
10)
x+2y=4 *2 2x+4y=8
2x+y=2 2x+y=2
3y=6
y=2
x=0