Question

Descompuneti in factori:
x^2 -7x+6.
Calculati produsul radacinilor ecuatiei:(x+1)^2=9
DAU 45 CORONITE

Answer 1

x^2-6x-x+6=
x(x-6)-(x-6)=
(x-6)(x-1)

x^2+2x+1-9=0
x^2+2x-8=0
▲=4+4•8
▲=36 => radical▲=6
x1=(-2-6)/2=(-4)
x2=(-2+6)/2=2
(-4)•2=(-8)