4r - 25 does not factor. If that were 4r2 - 25, it would be the difference of two squares, which factors to (2r - 5)(2r + 5)
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The GCF is 4r.
4 chits r given.we have to select the chits,then who's no. Is 1 will be given the first chance to play.we have to select a prize for which we have to play and then we have been given a game.in that we have to do at least 5times 4r winning that gift.