Question

Doar exercitiul 6. Va rog mult ! Chiar nu inteleg cum se rezolva!

Answer 1

a)delta = 1+24 = 25 => rad.delta = 5
x1=(-1-5)/4=-6/4=-3/2
x2=(-1+5)/4=1

b)delta = 1+120 = 121 => rad.delta = 11
x1=(1-11)/4=-10/4=-5/2
x2=(1+11)/4=3

c)delta = 25-24 = 1 => rad.delta = 1
x1=(5-1)/6=4/6=2/3
x2=(5+1)/6=1

d)delta = 25-16 = 9 => rad.delta = 3
x1=(5-3)/4=2/4=1/2
x2=(5+3)/4=2

e)delta = 9-8 = 1 => rad.delta = 1
x1=(-3-1)/4=-1
x2=(-3+1)/4=-2/4=-1/2

f)delta = 1+24 = 25 => rad.delta = 5
x1=(1-5)/4=-1
x2=(1+5)/4=6/4=3/2

g)delta = 1+24 = 25 => rad.delta = 5
x1=(-1-5)/6=-1
x2=(-1+5)/6=4/6=2/3

h)delta = 16+84 = 100 => rad.delta = 10
x1=(-4-10)/6=-14/6=-7/3
x2=(-4+10)/6=1

i)delta = 1+8 = 9 => rad.delta = 3
x1=(-1-3)/4=-1
x2=(-1+3)/4=2/4=1/2