1. –356
2. –172
3. 28
4. 72
Mathematics, 09.12.2019 14:31 shelbylynn1093
What is the discriminant of 9x2 + 2 = 10x?
1. –356
2. –172
3. 28
4. 72
i got "28" like this (could you tell me if i'm right? ) :
9x^2 -10x + 2 =10x-10x
9x^2 - 10x +2 =0
a=9, b=-10, and c=2
insert into the equation: x = (-b +/- √b^2 -4ac)/2a
) +/- √-10^2 - 4(9)(2))/2(9) (10 +/- √100 - 72)/18
(10 +/- √28)/18 and since the discriminant is just the number under the radical, we don't have to go any further. 28 was the number did i get it right?
Answers: 3
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You know the right answer?
What is the discriminant of 9x2 + 2 = 10x?
1. –356
2. –172
3. 28
4. 72
1. –356
2. –172
3. 28
4. 72
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