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Ii DeltaPQR, PDbotQR such that D lies on...

Ii `DeltaPQR`, PD`bot`QR such that D lies on QR, if PQ=a,PR=b,QD=c and DR=d, then prove that (a+b)(a-b)=(c+d)(c-d).

A

`(a-d) (a+d)=(b-c) (b+c)`

B

`(a-c) (b-d)=(a+c) (b+d)`

C

`(a-b) (a+b) = (c +d) (c-d)`

D

`(a-b) (c-d) =(a+b) (c+d)`

Text Solution

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The correct Answer is:
C
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