Question
Question: The vertex of the parabola y = x<sup>2</sup> - 8x + c will be a point on the x-axis if the value of ...
The vertex of the parabola y = x2 - 8x + c will be a point on the x-axis if the value of c is
A
-16
B
-4
C
4
D
16
Answer
16
Explanation
Solution
(y+16-c) = (x-4)2
The vertex = (4, c-16) is a point on x-axis
ā c - 16 =0
ā c = 16
