Răspuns :
2x²-7x+3=
a=2
b= -7
c=3
Δ=b²-4ac= (-7)² -4*2*3= 49- 24= 25
x₁ ;x₂= ( -b² +/- √Δ )/2a= [ -(-7) +/- √25 ] /2*2= (7 +/- 5)/4
x₁= (7+5)/4= 12/4=3
x₂= (7-5)/4= 2/4 =1/2
2x²-7x+3= 2( x-3)(x-1/2) aducem la acelasi numitor in paranteza a2a
=2( x-3) (2x-1)/2 se simplifica si da
=(x-3)(2x-1)
a=2
b= -7
c=3
Δ=b²-4ac= (-7)² -4*2*3= 49- 24= 25
x₁ ;x₂= ( -b² +/- √Δ )/2a= [ -(-7) +/- √25 ] /2*2= (7 +/- 5)/4
x₁= (7+5)/4= 12/4=3
x₂= (7-5)/4= 2/4 =1/2
2x²-7x+3= 2( x-3)(x-1/2) aducem la acelasi numitor in paranteza a2a
=2( x-3) (2x-1)/2 se simplifica si da
=(x-3)(2x-1)
2x² - 7x + 3 = 2x² - 6x - x + 3 = 2x(x - 3) -1(x - 3) = (x - 3) (2x - 1)