Question

determine as raizes da funçoes f(x)= 2x²-7x+3

Answer 1

A= 2
B= 7
C= 3

Δ= b2 - 4.a.c
Δ= (7)2 - 4.2.3
Δ= 49 - 24
Δ= 25
X'=(-b +  √ Δ)/2.a
X'= (-7 + √25)/2.2
X'= (-7 + 5)/4
X'= -2/4 simplificando por 2
X'= -1/2

X''=(-b -  √ Δ)/2.a
X''=(-7 -  √25)/2.2
X''=(-7 -5)/4
X''= -12/4
X''= -3

S= {-1/2; -3)