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Va roggg ajutati-ma imi trebuie urgent :'(

Va Roggg Ajutatima Imi Trebuie Urgent class=

Răspuns :

4.
a)
a/b=3/9 simplificam prin 3
a/b=1/3
b=3a

5a+b 5a+3a 8a
-------- = ------------ = ----- = 4
5a-b 5a-3a 2a

b)
2*(3a-b)=2a+5b
6a-2b=2a+5b
6a-2a=5b+2b
4a=7b
a/b=7/4

5

4/m=m/p
4p=m^2
p=m ^2/4

3/n=m/p
m*n=3p= 3m^2/4

m*n+p=3m^2/4+ m^2/4 = 4m^2/4=m^2 (patrat perfect )