If (a + b)2 - 2(a + b) = 80 and ab = 16, then what can be the value of 3a - 19b?
A. -16
B. -14
C. -18
D. -20
Answer: Option B
Solution (By Examveda Team)
By putting a = 8, b = 2(8 + 2)2 - 2(8 + 2) = 80
8 × 2 = 16
So, 3a - 19b
= 3 × 8 - 19 × 2
= -14
This Question Belongs to Arithmetic Ability >> Algebra
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