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Equations & Systems
medium
0:00.0
Solve for
x
x
x
:
x
2
+
10
x
+
21
=
0
x^2 + 10x + 21 = 0
x
2
+
10
x
+
21
=
0
.
A
-3
B
-7
C
3
D
Both a and b
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