CBSE Class 10 Maths (Standard) 2019 · Paper 30/2/1 · Question 22

Quadratic Equations 3 marks Medium

Write all the values of

p

for which the quadratic equation

x^{2} + p x + 16 = 0

has equal roots. Find the roots of the equation so obtained.

Answer

p = 8

gives the equal root

x = - 4

;

p = - 8

gives the equal root

x = 4

. So

p = \pm 8

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