Vertify
the - (-a) = a for a = - 19
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ATQ,
a=(-19)
Verification
-(-a) = a
Put value of a
-(-(-19)=-19
We known (-) multiplied with (-) then its changes to (+)
So,.
-(19)=(-19)
Remove brackets then
-19 = -19
Hence proved.
Mark as brainlist ans. With thanks.
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