1. If x = 2 + √3 and xy = 1, then the value of x2 + y2 is ?2. If a – b, a and a + b are the zeroes of the polynomial x3 – 3x2 + x + 1, then the value of a + b can be :- a) -1-√2 b) 1+ √2 c) -1+√2 d) 33. The Expression (x-y)3 - (X3-y3) is equal to :- a) 2x2 – 3x2y + 3xy2 + 2y2 b) 3xy (y-x) c) 3xy (x-y) d) 2x2 – 3x2y + 3xy24. If α, β and γ are the zeroes of the polynomial x3 + px2 + qx + 2 , such that αβ + 1, then the value of 2p – q – 3 is ?

Venkat Nihal , 12 Years ago

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