Question

4 si 5 .Multumesc :)))

Answer 1

Mg=√axb
/=fractie, supra

a) 2√3x2√27=4x√81=4x9=36
Mg=√36=6

b)(1+1/√2)x(2-√2)=(√2+1)/√2x(2-√2)
=(2√2-2+2-√2)/√2=√2/√2=1
Mg=√1=1

c) (5√2+7)x(7-5√2)=7²-(5√2)²=49-25x2=49-50=-1
Mg=√-1

5)
a)=
x√4+3=√8x√2
2x+3=4
2x=4-3
2x=1
x=1/2=0,5

b) n.c.=√6
x√4+√6x√24=√3x√27
2x+√144=√81
2x+12=9
2x=9-12
2x=-3
x=-3/2