1.

Without solving the following quadratic equation, find the value of ‘p’ for which the roots are equal. px2 – 4x + 3 = 0.

Answer»

Roots are equal 

b2 - 4ac = 0

Given equation px2 - 4x + 3 = 0 

Compare with ax2 + bx + c = 0, we get

a = p, b = - 4, c = 3

16 = 4.p.3

p = 16/12 = 4/3 



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