1.

(8) (21x4-14x2 + 7x)รท 7x3

Answer»

(21x*x*x*x-14x*x+7x)÷(7x*x*x) = 7x(3x*x*x-2x+1)÷(7x*x*x) = 3x- 2/x + 1/(x*x)

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