Question

The line of symmetry for the quadratic equation y=ax²-8x-3 is x=2. What is the value of ¨a¨?
A. -2
B. -1
C. 2
I had a teacher try and do this and they couldnt do it. s help me please!!!!

Answer 1

go to mathway.com

Answer 2

Q is wrong may be this is right
y=ax^2-8x+8
at x=2 y=0
then 4a-16+8=0
4x=8
x=2

Answer 3

or x=-b/2a
here b=-8
a=a
x=2
2=-(-8)/2a
4a=8
a=2