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
-
78
x
+
19
= 0, then
x
=
-
(
-78
)
±
(
-78
)
2
-
(
4
)
(
8
)
(
19
)
(
2
)
(
8
)
or,
x
=
78
±
6084
-
608
16
or,
x
=
78
±
5476
16
or,
x
=
78
±
74
16
or,
x
=
152
16
or,
x
=
4
16
or,
x
=
19
2
or,
x
=
1
4
Algebra
Analytic Geometry
Differential Calculus
Integral Calculus
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Copyright © Dayal D. Purohit, Ph.D.(Mathematics)