Question

x^3-7x+6 is equal to?
expansion??
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Answer 1

Step-by-step explanation:

Noticing that x=1 causes the expression to be 0 , do the following:

= x3−7x+6

=x3−x2+x2−7x+6

=x2(x−1)+x2−x−6x+6

=x2(x−1)+x(x−1)−6(x−1)

=(x−1)(x2+x−6)

=(x−1)(x+3)(x−2)

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Answer 2

Noticing that x=1 causes the expression to be 0 , do the following:

= x3−7x+6

=x3−x2+x2−7x+6

=x2(x−1)+x2−x−6x+6

=x2(x−1)+x(x−1)−6(x−1)

=(x−1)(x2+x−6)

=(x−1)(x+3)(x−2)

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