X^2 - 4X+30, X=1
= (1)^2 - 4*1 +30
= 1 - 4 + 30
= -3 + 30
= 27
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X^2 - 4X+30, X=1
= (1)^2 - 4*1 +30
= 1 - 4 + 30
= -3 + 30
= 27