Question

respondame 2) -x²+4x-3=0

Answer 1

a= -1
b= 4
c= -3
^ = 4²-4.(-1).(-3)
^= 16-12
^= 4
x= (-(-4)+-√4) /2
X= 4+-2
X'= (4+2=6) / 2 = 6/2 = 3
X''= (4-2 = 2) / 2 = 2/2 = 1