Solving Quadratic Equations using Quadratic Formula
If
a
x
2
+
b
x
+
c
= 0, then
x
=
-b
±
b
2
-
4ac
2a
So, if
x
2
-
10
x
-
11
= 0, then
x
=
-
(
-10
)
±
(
-10
)
2
-
(
4
)
(
1
)
(
-11
)
(
2
)
(
1
)
or,
x
=
10
±
100
+
44
2
or,
x
=
10
±
144
2
or,
x
=
10
±
12
2
or,
x
=
22
2
or,
x
=
-2
2
or,
x
=
11
or,
x
=
-1
Algebra
Analytic Geometry
Differential Calculus
Integral Calculus
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Copyright © Dayal D. Purohit, Ph.D.(Mathematics)