What is the value of the discriminant of f?

F (x) = 3x^2 + 12x + 5

Question

Whiskey

Mathematics

26 November, 18:10

What is the value of the discriminant of f?

F (x) = 3x^2 + 12x + 5

+4

Answers (2)

Know the Answer?

Chaim Turner · Answer 1

Chaim Turner 26 November, 18:17

0

The answer is F (x) = 3 (x+2) ^2-7

Rubi Mcclain · Answer 2

The usual discriminant is d=b²-4ac

d = (12) ² - 4 (3) (5) = 144 - 60 = 84

Answer: 84

When we have an even b like this we can get 1/4 of the usual discriminant with (b/2) ²-ac = 6² - (3) (5) = 36 - 15 = 21. That's a bit easier to calculate and usually just as good.

What is the value of the discriminant of f?F (x) = 3x^2 + 12x + 5

What is the value of the discriminant of f?

F (x) = 3x^2 + 12x + 5