a + b = 8, ab = 15 then a3+b3
130
148
152
174
(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
(a3-8) ÷ (a-2) =
a2+2 a+4
a2-2 a+4
a + 2
a - 2
If a-1/a =b then a2+1/a2
b2
b2+2
b2- 1/b2
b2-2
(-3 x2) + (6 x2) + (-x2) + 4 x2 =
6 x2
14 x2
-6 x2
7 x2
1022=
204
10404
10400
102
(2 x -3 y) - (x - y) =
3 x - 4 y
x - 2 y
3 x - 2 y
x - 4 y
If x = 1, y = -1 and z = -1 , find the value of x3 + y3 + z3 - 3xyz.
-4
2
0
16
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
(a3+b3+c3- 3 abc) ÷ (a+b+c) =
a2+b2+c2- 3 abc
a2+b2+c2+ab+bc+ca
a2+b2+c2- ab+bc
a2+b2+c2- ab-bc-ca