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If 1+9r^2+81r^4=256 and 1 + 3r + 9r^2= 3...

If `1+9r^2+81r^4=256` and `1 + 3r + 9r^2= 32`, then find the value of `1 - 3r + 9r^2` .
यदि `1+9r^2+81r^4=256` और `1 + 3r + 9r^2= 32` ,तो `1 - 3r + 9r^2` का मान ज्ञात करें :

A

8

B

4

C

16

D

12

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