" (c) "x^(2)+10x+21

Evaluate lim_(x to 3) (x^(2) - 10x + 21)/(x^(2) - 9)

Evaluate lim_(x to 3) (x^(2) - 10x + 21)/(x^(2) - 9)

Solve each of following equations, using the formula : (i) x^(2)-6x=27 (ii) x^(2)-10x+21=0 (iii) x^(2)+6x-10=0 (iv) x^(2)+2x-6=0

Solve x^(2) - 10x + 21= 0

Factorise the x ^(2) - 10 x + 21

Divide the polynomial x^(2) - 10x + 21 by each of the following divisors and find the remember in each case : x + 2

Let f (x)= signum (x) and g (x) =x (x ^(2) -10x+21), then the number of points of discontinuity of f [g (x)] is

Let f (x)= signum (x) and g (x) =x (x ^(2) -10x+21), then the number of points of discontinuity of f [g (x)] is