Question

use the quadratic formula to find any x-intercepts on the graph of the equation.
y=x^2 - 8x -1
x=?

Answer 1

set y =0, and solve the quadratic equation

Answer 2

\[x ^{2}-8x-1=0\]

Answer 3

Set a=1, b=-8 and c=-1 in the QF.

Answer 4

\[x=4+\sqrt{17} or x=4-\sqrt{17}\]

Answer 5

yup exactly

Answer 6

you need to use the quadratic formula

Answer 7

\[x=\frac{ -b \pm \sqrt{b^2-4ac} }{ 2a }\]

Answer 8

so the final answer would be

Answer 9

\[(4+\sqrt{17}, 0) and (4-\sqrt{17}, 0)\]

Answer 10

8 square root 68 over 8?

Answer 11

yup

Answer 12

is it over 4?

Answer 13

if a =1 yes

Answer 14

so am i right? it is over 4

Answer 15

over 2x1