[" 5.Find the value of "b^(2)-4ac" ,if "],[[" (i) "a=3,b=9,c=6," (ii) "a=2,b=-8,c=8],[" (iii) "a=1,b=1,c=1]]

If (x+a) (x+b) (x+c) =x^(3) +14x^(2) +59x + 70 , find the value of (i) a+b+c (ii) (1)/(a) +(1)/(b) +(1)/(C ) ( iii) a^(2) +b^(2) +c^(2) (iv) (a)/(bc) +(b)/( ac) +(c )/( ab)

Find the coordinates of centorid G of ABC, if (i) A(8,9),B(4,5),C(6,2) (ii) A(11,8), B(-6,5), C(1,-28)

If (1, 1, 1) is the centroid of the triangle with vertices (2a, 3, 7), (-4, 3b, -8) and (8, 4, 6c), find a, b, c.

If (1, 1, 1) is the centroid of the triangle with vertices (2a, 3, 7), (-4, 3b, -8) and (8, 4, 6c), find a, b, c.

If a=1,b=8,c=15, find the value of b^2-4ac.

In each of the following, check how the points A,B and C are situated. (i) A(-2,2),B(8,-2),C(-4,-3) (ii) A(-a,-b),B(a,b),C(a^2,ab),agt1 (iii) A(4,0),B(-1,-1),C(3,5)

If a=1, b=8, c=15, find the value of b^(2)-4ac .

Show that the following points are collinear: (i) A(2, -2), B(-3, 8) and C(-1, 4) (ii) A(-5, 1), B(5, 5) and C(10, 7) (iii) A(5, 1), B(1, -1) and C(11, 4) (iv) A(8, 1), B(3, -4) and C(2, -5)