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OK! First of all, a "zero" is
where a graph crosses or touches the x-axis.
They're called "zeros" because that's where
y
=
0 !
*Officially, these are called "real
zeros".
Here are some questions for you:
Can we draw a parabola (a 2nd degree
polynomial) that
|
touches the x-axis twice? |
 |
| touches the
x-axis once? |
 |
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never touches the x-axis? |
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Continued on the
next
page
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