One of the factors of x2 + 1/x2 +x - 2x -2/x is
x - 1/x
x + 1/x - 1
x+ 1/x
x2 + 1/x2
Factorise ax + bx + ay + by .
( a + b ) (x +a )
( a + b ) (x + y )
( a + b ) ( x + b )
None of these
Factorise 3m3 - 6m2 :
3m (m -2 )
3m2 (m-2)
3m2 ( m + 2 )
3m (m2 - 2)
Factorise 4x2 + 9y2 – 4z2 – 12 xy
( 2x – 3y + 2z) (2x -3y – 2z)
(2x + 3y – 2z) ( 2x + 3y + 22)
(2x – 3y – 2z) ( 2x – 3y + 2z)
(2x + 3y + 2z) ( 2x – 3y -2z)
Factorize 21a2bc + 28ab2c + 35abc2
7a2bc(3a + 4b + 5c)
3ab2c(3a + 46 + 5c)
7abc(3a + 4b + 5c)
7ab2c(3a + 4 + 5c)
If x + 1/x = 8, then the value of x2 + 1/x2 is
66
68
61
62
The value of x2 + 1/x2 when x - 1/x = 7 is
51
50
53
55
If the factors of a2 + b2 + 2(ab + bc + ca) are (a + b + 3) and (a + b + nc), then the value of m + n is
0
2
4
6
If (x + 1) is a factor of 2x3 - x2 - (2a -3)x + 2, then the value of 'a' is
3
3/2
1/2
Factorise 6 ab - b2 + 12 ac - 2 bc
( b + 2 c ) ( 6 a - b )
(b - 2c) ( 6a + b )
( b - 2b ) (6a + b )
