Solving Quadratic Equations using Quadratic Formula
If
a
x
2
+
b
x
+
c
= 0, then
x
=
-b
±
b
2
-
4ac
2a
So, if
8
x
2
+
18
x
+
4
= 0, then
x
=
-
(
18
)
±
(
18
)
2
-
(
4
)
(
8
)
(
4
)
(
2
)
(
8
)
or,
x
=
-18
±
324
-
128
16
or,
x
=
-18
±
196
16
or,
x
=
-18
±
14
16
or,
x
=
-4
16
or,
x
=
-32
16
or,
x
=
-1
4
or,
x
=
-2
Algebra
Analytic Geometry
Differential Calculus
Integral Calculus
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Copyright © Dayal D. Purohit, Ph.D.(Mathematics)