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kimihyunLolly
@kimihyunLolly
July 2022
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8 класс!!! Решите 199 только 1!!! Срочно!!!
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sedinalana
1
(2x²-3x+5)/2(3x+5)+0,5(3x+5)/(2x²-3x+5)=1
(2x²-3x+5)/(3x+5)=t
t/2+1/2t=1
t²-2t+1=0,t≠0
(t-1)²=0
t=1
(2x²-3x+5)/(3x+5)=1
2x²-3x+5=3x+5
2x²-6x=0
2x(x-3)=0
x=0 U x=3
2
x²+2x+1=t
t/(t+1)+(t+1)/(t+2)=7/6
6t(t+2)+6(t+1)²-7(t+1)(t+2)=0
6t²+12t+6t²+12t+6-7t²-14t-7t-14=0
5t²+3t-8=0
D=9+160=169
t1=(-3-13)/10=-1,6⇒(x+1)²=-1,6 нет решения
t2=(-3+13)/10=1⇒(x+1)²=1
x+1=-1 U x+1=1
x=-2 U x=0
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Thanks 1
kimihyunLolly
Спасибо огромное!!!!!!!
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Answers & Comments
(2x²-3x+5)/2(3x+5)+0,5(3x+5)/(2x²-3x+5)=1
(2x²-3x+5)/(3x+5)=t
t/2+1/2t=1
t²-2t+1=0,t≠0
(t-1)²=0
t=1
(2x²-3x+5)/(3x+5)=1
2x²-3x+5=3x+5
2x²-6x=0
2x(x-3)=0
x=0 U x=3
2
x²+2x+1=t
t/(t+1)+(t+1)/(t+2)=7/6
6t(t+2)+6(t+1)²-7(t+1)(t+2)=0
6t²+12t+6t²+12t+6-7t²-14t-7t-14=0
5t²+3t-8=0
D=9+160=169
t1=(-3-13)/10=-1,6⇒(x+1)²=-1,6 нет решения
t2=(-3+13)/10=1⇒(x+1)²=1
x+1=-1 U x+1=1
x=-2 U x=0