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harshit

· started a discussion

· 1 Months ago

shortcut (Question: 285141.0 )

ny shrtcut.

Question:

If (a + b – 6)2 + a2 + b2 + 2b + 1 = 2ab + 2a, then the value of (a – b) is –

Options:
A)

1

B)

2

C)

3

D)

4

Solution:

Ans: (a)

  

ABHIJITH P M

· commented

· 1 Months ago

a^2+b^2+2b+1-2ab-2a = (-a+b+1)^2
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