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polinaborisova5
@polinaborisova5
July 2022
2
5
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1)4/25-7/15=
2)х^2-х=12
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Answers & Comments
yellok
1) 4/25-7/15=(4*3-7*5)/75= (12-35)/25=-23/25
2) x²-x=12
x²-x-12=0
D=1+4*12=49
x(1)=(1+7)/2=4
x(2)=(1-7)/2=-3
1 votes
Thanks 1
vipmakhinakhon
там 7/15 а не 7/25
vipmakhinakhon
Ответ во вложении))))))))))
1 votes
Thanks 1
vipmakhinakhon
пож выбери мой ответ лучшим
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Answers & Comments
2) x²-x=12
x²-x-12=0
D=1+4*12=49
x(1)=(1+7)/2=4
x(2)=(1-7)/2=-3