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МаринаСимс
@МаринаСимс
November 2021
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ПОМОГИТЕ,ПОЖАЛУЙСТА
6 срочнаааа!!!!!
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m11m
Verified answer
Y≠ -2.5
y≠1.5
[(14-2y)/(2y+5)] + [(6y-2)/(2y-3)]=[(14-2y)/(2y+5)] * [(6y-2)/(2y-3)]
[(14-2y)(2y-3)+(6y-2)(2y+5)]/[(2y+5)(2y-3)]=[(14-2y)(6y-2)]/[(2y+5)(2y-3)]
(14-2y)(2y-3)+(6y-2)(2y+5)=(14-2y)(6y-2)
28y-4y²-42+6y+12y²-4y+30y-10=84y-12y
²-28+4y
8y
²+60y-52=-12y
²+88y-28
8y
²+12y
²+60y-88y-52+28=0
20y
²-28y-24=0
5y
²-7y-6=0
D=49+120=169
y
₁=(7-13)/10= -6/10= -0.6
y₂=(7+13)/10=2
Ответ: -0,6; 2.
3 votes
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Answers & Comments
Verified answer
Y≠ -2.5y≠1.5
[(14-2y)/(2y+5)] + [(6y-2)/(2y-3)]=[(14-2y)/(2y+5)] * [(6y-2)/(2y-3)]
[(14-2y)(2y-3)+(6y-2)(2y+5)]/[(2y+5)(2y-3)]=[(14-2y)(6y-2)]/[(2y+5)(2y-3)]
(14-2y)(2y-3)+(6y-2)(2y+5)=(14-2y)(6y-2)
28y-4y²-42+6y+12y²-4y+30y-10=84y-12y²-28+4y
8y²+60y-52=-12y²+88y-28
8y²+12y²+60y-88y-52+28=0
20y²-28y-24=0
5y²-7y-6=0
D=49+120=169
y₁=(7-13)/10= -6/10= -0.6
y₂=(7+13)/10=2
Ответ: -0,6; 2.