y = x^2 + ax + b
Ola Gabriela
Vx = -a/2 = -1
a = 2
x² + 2x + b
delta
d² = 4 - 4b
Vy = -d²/4a = -4
d² = 16
4 - 4b = 16
4b = -12
b = -3
ab = -2*3 = -6
pronto
y=x²+ax+b
a=c-yv/(xv)² ----> 1=b-(-4)/(-1)² --> 1=b+4 ---> b+4=1 --> b=1-4 ==> b=-3 #
y=x²+ax-3 ---> Substituindo x=-1 e igualando a -4
-4=(-1)²+a.(-1)-3
-4=1-a-3 ---> -4=-2-a --> -4+2=-a ---> -2=-a --> a=2 #
===>a.b=2.(-3) ---> ab=-6 #
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Answers & Comments
Ola Gabriela
Vx = -a/2 = -1
a = 2
x² + 2x + b
delta
d² = 4 - 4b
Vy = -d²/4a = -4
d² = 16
4 - 4b = 16
4b = -12
b = -3
ab = -2*3 = -6
pronto
y=x²+ax+b
a=c-yv/(xv)² ----> 1=b-(-4)/(-1)² --> 1=b+4 ---> b+4=1 --> b=1-4 ==> b=-3 #
y=x²+ax-3 ---> Substituindo x=-1 e igualando a -4
-4=(-1)²+a.(-1)-3
-4=1-a-3 ---> -4=-2-a --> -4+2=-a ---> -2=-a --> a=2 #
===>a.b=2.(-3) ---> ab=-6 #
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