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Exercitiile 1,2,3,4,5,6

Exercitiile 123456 class=

Răspuns :

ex 1 :a) x=12+3
x=15
c)x(√2-1)=2-2√2
x(√2-1)=2(1-√2)
x(√2-1)=-2(√2-1)
x= -2