Question
If x = 21, then the value of x5 -
22x4 + 22x3 - 22x2 + 22x - 1 isSolution
Given expression :Â x 5Â - 22x 4Â + 22x 3Â - 22x 2Â + 22x - 1 = x5 - 21x 4Â - x4 +Â 21 x 3Â + x3 -Â 21 x2 - x2 +Â 21 x + x - 1 = x5 -x5 -x4 + x4 +x3-x3-x2+x2+21 -1 [given that x = 21] = 21-1 = 20
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