Question

show that polynomial x cube - 2x square + 3x - 18 is a multiple of x - 3

Answer 1

Put x=3 in the polynomial
${3}^{3} - 2 \times ( {3}^{2} ) + 3 \times (3) - 18$
Solve it and if it is equal to zero the polynomial is a multiple of 3.

Answer 2

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