If `A xx B`={(a,x),(a,y),(b,x),(b,y)} find A and B.

If A={a,b,c},B={p,q,r} then find AxxB and B xx A .

If A={x:1 < x < 5},B={x: 3 < x < 7} .Find A nn B .

Which of the followings are relations from {x, y, z} to {a, b, c, d} {(x, a),(x, b),(x, c), (x, d),(y, a) (y, b),(y, c),(y, d)}

If the zeroes of the polynomial x^3-3x^2+x+ 1 are a -b , a, a + b , find a and b.

Which of the followings are relations from {x, y, z} to {a, b, c, d} {(a, x),(b,y), (c, z)}

If A(x_1,y_1),B(x_2,y_2) and C(x_3,y_3) are the vertices of triangleABC ,find the coordinates of the centroid of the triangle.

If the zeroes of the polynomial x^3- 12x^2+ 39x - 28 are a - b, a, a + b , find a and b.

If the zeroes of the polynomial x^3-3x^2+x+1 are a-b,a,a+b,find a and b.

If f(x)=b(x-a)/(b-a)+a(x-b)/(a-b) ,show that f(a)+f(b)=f(a+b).

Using (x+a)(x+b) = x^2 + (a+b)x + ab, find 9.7 x 9.8