Question

write all the values of p for which the quadratic equation x² + pc + 16= 0 has equal roots. Find the roots of equation so obtained.
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Answer 1

Step-by-step explanation:

a=1

b=p

c=16

b²-4ac=0

b²=4ac

p²=4 (1)(16)

p²=64

p=+_8

if +8

then solution is x= -4

if -8

then solution is x= +4