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Gnoma [55]
3 years ago
15

PLEASE HELP A QUESTION OF LIFE OR DEATH PLEASE HELP PLEASE!!!!!!!!!!!

Mathematics
1 answer:
KonstantinChe [14]3 years ago
8 0
To be a perfect square this condition must be applied b^2 -4ac>=0
where a is coefficient of x^2 and b is coefficient of x and c is the last term
so in this equation
a=1 ; b = ? ; c= 81
b^2 -4ac >=0
b^2 -4(1)(81)>=0
b^2 >= 324
so b= 18
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