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CBSE Class 9 Answered

Using factor theorem factorise the polynomial x rays to 4 + x rays to 3 -7x rays to 2 -x +6
Asked by kinalsp | 20 Jun, 2018, 09:18: PM
answered-by-expert Expert Answer
x4 + x3 - 7x2 - x + 6 = (x - 2)(x3 + 3x2 - x - 3)
Dividing x3 + 3x2 - x - 3 by x - 1 we get 
x4 + x3 - 7x2 - x + 6 = (x - 2)(x - 1)(x2 + 4x + 3)
                               = (x - 2)(x - 1)(x + 3) (x + 1)
Answered by Sneha shidid | 21 Jun, 2018, 10:18: AM
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