Question

4
If the roots of x2 - 4x -log, a=0 are real, then​

Answer 1

Step-by-step explanation:

then their discriminant is greater than or equal to 0

b²-4ac

where

b =-4

a=1

c=-loga

so

16-4×(-loga)×1

16+4loga=0

loga=-4

a=10^-4 or a>10^-4

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Answer 2

Answer:

the least value of a is 1/81.

Step-by-step explanation: