sum

22
Jul
Examples 7 to 9

(7) Find the values of  m  for which  16x2 + mx + 9 = 0 has both equal roots.

Soln. For  equal  roots,  we  must have

D  =  0.

\therefore

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22
Jul
Examples 4 to 6

(4) Discuss the nature of the roots of the following equations :

(i) 4x2  +  15x  –  25  =  0

(ii) 4x2  –  12x  +  1  =  0

(iii) 9x2  +  6x  +  1  = …

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22
Jul
Examples 1 to 3

Examples  :

(1) Solve  the equations :

(i) 3x2  +  5x  +  2  =  0

(ii) 3x2  –  5x  +  2  =  0

(iii)  3x2  +  5x  –  2  =  0

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22
Jul
To  form a Quadratic Equation

To  form a Quadratic Equation :–   A quadratic equation whose roots are \alpha1  and 

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