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Byju's Answer
Standard X
Mathematics
Solving a Quadratic Equation by Factorization Method
Sonu is 5 yea...
Question
Sonu is 5 years elder to his brother. 4 years ago Sonu was twice age of his brother. Find their present ages.
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Solution
Let
the
present
age
of
Sonu
'
s
brother
is
x
years
.
Then
Sonu
'
s
age
will
be
x
+
5
years
.
4
Years
ago
Age
of
Sonu
'
s
brother
=
x
-
4
years
.
Age
of
sonu
=
x
+
5
-
4
=
x
+
1
Years
.
A
.
T
.
Q
x
+
1
=
2
x
-
4
x
+
1
=
2
x
-
8
x
-
2
x
=
-
8
-
1
-
x
=
-
9
x
=
9
years
.
So
,
Age
of
Sonu
'
s
brother
is
9
years
.
And
Age
of
Sonu
=
x
+
5
=
9
+
5
=
14
years
.
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