Question

Q1=Factorize following.
$1)x ^{2} + 9x + 18$
$2)3x^{3} - x^{2} - 3x + 1$
$3)x^{3} - 23x^{2} + 142x - 120$

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Answer 1

Answer:

Given: x

2

−3x−18

=x

2

−6x+3x−18, (split the middle term)

=(x

2

−6x)+(3x−18), (group the pair of terms)

=x(x−6)+3(x−6), (factor each binomials)

=(x−6)(x+3), (factor out common factor (x−6)

Answer 2

Answer:

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