Question

Check my work?

Answer 1

I need to find the vertex of f(x) = 5x2 + 2x + 1

Answer 2

f(x) = 5x2 + 2x + 1

a = 5; b = 2; c = 1

x = (-2)/10 = (-1)/5

f(x) = 5((-1)/5)2 + 2((-1)/5) + 1

f(x) = -1 + (-0.4) +1

x = (-1)/5; y = -0.4

Answer 3

@Elsa213 @Empty @EmilyD22 @freckles @pooja195 @skullpatrol

Answer 4

@Loser66

Answer 5

So, am I right @Loser66 ?

Answer 6

y = 4/5

Answer 7

Hmmm, can you walk me through on how?

Answer 8

Oh, I see, change the decimal to a fraction.

Answer 9

Wait, no.

Answer 10

\(y=5(\dfrac{-1}{5})^2 +2*\dfrac{-1}{5}+1 =5*\dfrac{1}{25}-\dfrac{2}{5}+1\)

\(=\dfrac{1}{5} -\dfrac{2}{5}+1=-\dfrac{1}{5}+1=\dfrac{-1}{5}+\dfrac{5}{5}=\dfrac{4}{5}\)

Answer 11

Ok, was x right?

Answer 12

yes