If x+1/x = 3 then x2 + 1/x2 =
9
7
6
3
a + b = 8, ab = 15 then a3+b3
130
148
152
174
(x - 1/x)2 =
x2 + 1/x2
x2 - 1/x2
x2 + 2 + 1/x2
x2- 2 +1/x2
(x+3)(x-5)=
x2- 15
x2+15
x2-2 x- 15
x2+2 x- 15
(a+b)2 - (a-b)2 =
a2-b2
4 ab
2 ab
2 a2 + 8 b2
(a - b - c)2 =
a2 - b2 - c2 - 2 ab + 2 bc - 2 ca
a2 + b2 + c2 - ab + bc - ca
a2 + b2 + c2 - 2 ab + 2 bc - 2 ca
a2 + b2 + c2
Which of the following is a false statement ?
A + B = B + A
A . B = B. A
A / B = A .1/B
A-B= B-A
To calculate 103 x 97, which of the following is use to find the above product?
(a+b)2
(a-b)2
(a+b)(a-b)
a3+b3
(-3 x2) + (6 x2) + (-x2) + 4 x2 =
6 x2
14 x2
-6 x2
7 x2
If x = 2 then (1/2) x3 is
8
2
4
1
