Question

show that (x-2) is
a factor of x 3-42²-28+20​

Answer 1

Answer:

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Answer 2

Solution:

Let p(x)=x3-42^2-28+20 g(x)=x+1

The zero of g(x)= -2

Then p(-2)=(-2)3-42^2-28+20

=(-6)-17654-28+20

=(-6)-17626+20

=(-6)-17606

=0