Solving Quadratic Equations with Complex Solutions
Algebra · Flashcards · Recall
ALGEBRA · FLASHCARDS
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QUESTION
Identify the complex conjugate of
a
+
b
i
a+bi
a
+
bi
.
QUESTION
Identify the sum of roots of
a
x
2
+
b
x
+
c
=
0
ax^2+bx+c=0
a
x
2
+
b
x
+
c
=
0
in terms of
a
a
a
and
b
b
b
.
QUESTION
Which condition on
Δ
\Delta
Δ
guarantees two nonreal complex solutions?
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ANSWER
Δ
<
0
\Delta<0
Δ
<
0
. Negative discriminant means the square root involves
negative
\sqrt{\text{negative}}
negative
.
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