Math miscellaneousHard
Question
The value of 
is equal to :
is equal to :Options
A.7775
B.7785
C.7770
D.7780
Solution
Given = 
(r2 - r - 6) = 
(r2 - r - 6) -
(r2 - r - 6)
=
- 6(30 -15)
= 8215 - 345 - 90 = 7780
(r2 - r - 6) = (r2 - r - 6) -(r2 - r - 6)=
- 6(30 -15)= 8215 - 345 - 90 = 7780
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