Question

(IV) 32 Factorise the following polynomials: x3 - 8x2 + x + 42 (ii) x3 + 13x2 + 31x - 45 (iii) x3 + 6x2 + 11x + 6 (iv) 12x3 + 4x2-3x - 1 W *4 + x3 - 7x2 -*+ 6 Tx-48--*+ 16x - 12
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Answer 1

Answer:

(x+1)(x+2)(x+10)

The value of x  

3

+13x  

2

+32x+20 is

x  

3

+x  

2

+12x  

2

+12x+20x+20

=x  

2

(x+1)+12x(x+1)+20(x+1)

=(x−1)(x  

2

+12x+20)

=(x−1)(x  

2

+10x+2x+20)

=(x+1)[x(x+10)+2(x+10)]

=(x+1)(x+2)(x+10)

Step-by-step explanation:

Answer 2

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