anonymous
  • anonymous
The graph of which function has an axis of symmetry at x =-1/4 ? f(x) = 2x2 + x – 1 f(x) = 2x2 – x + 1 f(x) = x2 + 2x – 1 f(x) = x2 – 2x + 1
Mathematics
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anonymous
  • anonymous
The graph of which function has an axis of symmetry at x =-1/4 ? f(x) = 2x2 + x – 1 f(x) = 2x2 – x + 1 f(x) = x2 + 2x – 1 f(x) = x2 – 2x + 1
Mathematics
chestercat
  • chestercat
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Nnesha
  • Nnesha
\[\huge\rm x=\frac{ -b }{ 2a }\] to find c-coordinate of vertex(axis of symmetry)
Nnesha
  • Nnesha
b and a values are \[\rm Ax^2+Bx+C\] where a=leading coefficient b=middle term c=constant term
anonymous
  • anonymous
will give medals

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anonymous
  • anonymous
i have answer chioces listed
anonymous
  • anonymous
Nnesha
  • Nnesha
i know so which is your answer A , B ,C or D >
anonymous
  • anonymous
im thinkin c
anonymous
  • anonymous
Nnesha
  • Nnesha
no.
anonymous
  • anonymous
im horrible at math lol but my next guess is d
Nnesha
  • Nnesha
don't guess next time when you say is it B or A or D i'll ask to explain it for me
Nnesha
  • Nnesha
start with 1st option okay what is a and b value in that equation
anonymous
  • anonymous
2
Nnesha
  • Nnesha
a=2 right b=1 x is same as 1x not substitute a and b for their value into that formula
anonymous
  • anonymous
-1/2*2?
Nnesha
  • Nnesha
yes right multiply 2 times 2 ?
anonymous
  • anonymous
-1/4
anonymous
  • anonymous
so a is the answer
Nnesha
  • Nnesha
i think so :=)
anonymous
  • anonymous
thank you!!!
Nnesha
  • Nnesha
you're lucky don't have to check other 3 options ...
Nnesha
  • Nnesha
np

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