Solve Quadratics by Multiple Methods
Algebra 1 · Flashcards
ALGEBRA 1 · FLASHCARDS
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QUESTION
What is the discriminant of
x
2
−
6
x
+
9
=
0
x^2-6x+9=0
x
2
−
6
x
+
9
=
0
?
QUESTION
Identify the solution type from
Δ
=
0
\Delta=0
Δ
=
0
.
QUESTION
How do you rewrite
−
k
\sqrt{-k}
−
k
for real
k
>
0
k>0
k
>
0
using
i
i
i
?
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ANSWER
−
k
=
i
k
\sqrt{-k}=i\sqrt{k}
−
k
=
i
k
. Factor out
−
1
-1
−
1
from under the square root.
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