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) 3

3. 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 + 3xy²

4. 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

13 Years agoGrade Select Grade