(3+2√7) (3-2√7) plz solve the answer class 9
Answers
Answered by
1
Answer:
-19
Step-by-step explanation:
we will use the identity that (a+b)(a-b)=a(sq.)-b(sq.)
here a=3 and b=2root7
=(3)sq.-(2root7)sq.
=9-4×7
=9-28
=-19
HOPE THIS HELPS YOU....
Answered by
0
Step-by-step explanation:
(3+2√7)(3-2√7)
=(3)2-(2√7)2
=9-28
=-19
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