CBSE Class 9 Answered
Factorise
Asked by Shank10 | 18 Aug, 2008, 12:00: PM
Expert Answer
(a) put x = --1 then x3 --12x2 + 47 x +60 will become ( --1)3 --12( --1)2 + 47 ( --1) +60 = --1 --12 --47 + 60 =0
therefore x + 1 is a factor
(b) put x == --2 then 6x3 + 11 x 2 - 4x - 4 will become 6 ( --2)3 + 11 ( - 2)2 --4 (--2) -4 = --48 + 44 +8 --4= 52 --52 ==0 .. therefore x + 2 is a factor
Answered by | 18 Aug, 2008, 01:33: PM
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