Question

va rog ma ajutati si pe mine va rog a multe de scris va multumesc

Answer 1

2
a=puncte concurent 1
a-1=puncte concurent 2
a-1-0,5=a-1,5=puncte concurent 3
a+a-1+a-1,5=35
3a-2,5=35
3a=35+2,5
3a=37,5
a=12,5
a-1=12.5-1=11,5
a-1,5=11,5-1,5=10

3
(√5-2)x > √20
(√5-2)x > 2√5
x> 2√5/(√5-2)
x> 2√5(√5+2)/(√5-2)(√5+2)
x> (10+4√5)/(5-4)
x> 10+4√5

4.
(2x+6)/(x²+4x+3)=
=2(x+3)/(x²+x+3x+3)=
=2(x+3)/x(x+1)+3(x+1)=
=2(x+3)/(x+1)(x+3)=
=2/(x+1)