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Quadratic Inequalities 1
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Expression 4: "x" squared minus 6 "x" plus 8 greater than 0 Has graph. To audio trace, press ALT+T.
x
2
−
6
x
+
8
>
0
4
We are looking for values of x to make x^2-6x+8 (the values of y) positive. We see that y is positive when x>4 and when x<2
We are looking for values of x to make x^2-6x+8 (the values of y) positive. We see that y is positive when x>4 and when x<2
5
Expression 6: "y" equals 0 left brace, "x" less than 2 , right brace Has graph. To audio trace, press ALT+T.
y
=
0
x
<
2
6
Expression 7: "y" equals 0 left brace, "x" greater than 4 , right brace Has graph. To audio trace, press ALT+T.
y
=
0
x
>
4
7
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8
9
powered by
powered by
"x"
x
"y"
y
"a" squared
a
2
"a" Superscript, "b" , Baseline
a
b
7
7
8
8
9
9
over
÷
functions
(
(
)
)
less than
<
greater than
>
4
4
5
5
6
6
times
×
| "a" |
|
a
|
,
,
less than or equal to
≤
greater than or equal to
≥
1
1
2
2
3
3
negative
−
A B C
StartRoot, , EndRoot
pi
π
0
0
.
.
equals
=
positive
+
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