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a) f(x)=x^2+3x-3
x^2+3x-3=0
delta=b^2-4ac
delta=3^2-4.1.(-3)
delta=9+12
delta=21
xv=-b/2a
xv=-3/2.1
xv=-3/2
yv=-delta/4a
yv=-21/4.1
yv=-21/4
(-3/2, -21/4)
x^2+3x-3=0
delta=b^2-4ac
delta=3^2-4.1.(-3)
delta=9+12
delta=21
xv=-b/2a
xv=-3/2.1
xv=-3/2
yv=-delta/4a
yv=-21/4.1
yv=-21/4
(-3/2, -21/4)
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