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Question : 96 of 120
Marks:
+1,
-0
Solution:
(B) Given
=
− 2
+ 5
and
= 2
+
− 3
Now,
−
= (2−1)
+ (1+2)
+ (−3−5)
=
+ 3
− 8
3
+
= 3(
− 2
+ 5
) + (2
+
−3
)
= (3+2)
+ (−6+1 )
+ (15−3)
= 5
− 5
+ 12
∴ (
-
)∙(3
+
) = (
+3
− 8
) ∙ (5
−5
+12
)
= 5 − 15 − 96 = −106
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