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Byju's Answer
Standard XII
Mathematics
Nature of Roots
If alpha;,...
Question
If α, β be roots of equation (x−a)(x−b)+c=0, c is not equal to 0 then roots of equation (x-α)(x-β)-c=0 are?
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Solution
Dear Student,
α
,
β
are
roots
of
equation
(
x
−
a
)
(
x
−
b
)
+
c
=
0
,
c
≠
0
(
x
−
a
)
(
x
−
b
)
+
c
=
0
x
2
-
a
+
b
x
+
ab
+
c
=
0
sum
of
roots
=
α
+
β
=
-
-
a
+
b
1
=
a
+
b
product
of
roots
=
αβ
=
ab
+
c
1
=
ab
+
c
Now
consider
the
equation
(
x
-
α
)
(
x
-
β
)
-
c
=
0
(
x
-
α
)
(
x
-
β
)
-
c
=
0
x
2
-
α
+
β
x
+
αβ
-
c
=
0
sum
of
roots
=
-
-
α
+
β
1
=
α
+
β
=
a
+
b
Product
of
roots
=
αβ
-
c
1
=
αβ
-
c
=
ab
Hence
the
roots
of
(
x
-
α
)
(
x
-
β
)
-
c
=
0
are
a
and
b
Regards
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0
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