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)
If x = 7, find the value of the expression x3 + 7x2 + 4x + 2
748
685
716
694
The value of x2 + 1/x2 when x - 1/x = 7 is
51
50
53
55
The solution of the equation 3 (x - 5) = 5x- 27 is
x = 6
x = 5
x = 4
x = 3
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
The product of (2a - 5b)(a + 3b) is
2a2 - ab + 15b2
2a2 + ab + 15b2
2a2 + ab - 15b2
If (x + 1) is a factor of 2x3 - x2 - (2a -3)x + 2, then the value of 'a' is
3
3/2
1/2
-60x5 ÷ 5x2
-15x2
12x3
-12x7
-12x3
x3 ÷ x3 =
1
x
None of these
If x + a is a factor of x4 - a2x2 + 3x - a, then the value of a is
