class 9 ncert math book ❤i love math so much
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Step-by-step explanation:
(i) x³-2x²-x+2
= x²(x-2) -1(x-2)
= (x²-1) (x-2)
(ii) x³+13x²+32x+20
= x³+1x²+12x²+12x+20x+20
= x²(x+1)+12x(x+1)+20(x+1)
= (x-1) (x²+12x+20)
= (x-1) (x²+10x+2x+20)
= (x-1) [x(x+10)+2(x+10)
= (x-1)(x+2)(x+10)
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