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MHT CET202012 Oct 2020Morning ShiftMathematicsTrigonometric EquationsActual

If (A+B) (A-B) = (C+D) (C-D) , then A B=

Options

  1. AC D
  2. B- C D
  3. CC D
  4. D- C D

Correct answer

D. - C D

Step-by-step solution

(A+B) (A-B) = (C+D) (C-D) (A+B)+ (A-B) (A+B)- (A-B) = (C+D)+ (C-D) (C+D)- (C-D) 2 A B 2 A B = 2 C D -2 C D A B=- C D

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