Question

Show that x 2 x 3 and x 7 are the factors of x3 -6x2-13x+42.

Answer 1

Step-by-step explanation:

put x=2

x³-6x²-13x+42=2³-6*2²-13*2+42

=8-24-26+42=0

so x-2 is a factor

similarly put x 3 7 you get 0 then these are factor

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