Question

What are the x– and y–intercepts of the quadratic equation y = (x – 1)2 – 16? Identify the x–intercepts by graphing the quadratic equation.

i know the y intercept is (0,-15) I'm just not so sure about the x intercept .

Answer 1

if x=0 y=?
if y =0 x=?

Answer 2

y= (0 -1)^2 -16
y=-15

0 =(x-1)^2 -16
16= (x-1)^2
\[\pm \sqrt{16} =x-1\]

Answer 3

equate y=0 to get the x
equate x=0 to get the y

Answer 4

finish that up and you'll have two values for x ...the intercepts (roots)

Answer 5

ok thanks

Answer 6

sure:)