7
4
find the volue=
4
4
Answers
Answered by
0
excuse me, l didnt understanding this question in the way you have written
Answered by
0
Step-by-step explanation:
−
5
=
(
7
+
5
)(
7
−
5
)
(
7
−
5
)(
7
−
5
)
............ rationalization of denominator
=
(
7
)
2
−(
5
)
2
(
7
)
2
+(
5
)
2
−2
7
5
............... Using, (a−b)
2
=a
2
−2ab+b
2
and a
2
−b
2
=(a−b)(a+b)
=
2
12−2
35
⟹
7
+
5
7
−
5
=6−
35
=a+b
35
So, a=6,b=−(1)
a−b=6+1=7
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