Question

How many roots do the following equations have?

-12x2 - 25x + 5 + x3 = 0

A. 2

B. 3

C. 4

D. 5

Answer 1

@rajee_sam
@Numb3r1

Answer 2

An equation can have up to as many roots as its degree (highest power of x) so 4 and 5 are out.

Answer 3

For the no. of roots you have to look at the highest degree of the function. Here it is 3 so it will have 3 roots

Answer 4

Not necessarily. If there's a quadratic factor without real roots you'll only have two.

Answer 5

It is only asking how many roots it will have. It will have 3 roots all real and complex put together.

Answer 6

ok

Answer 7

http://www.wolframalpha.com/input/?i=-12x%5E2+-+25x+%2B+5+%2B+x%5E3+%3D+0

Answer 8

True.

Answer 9

so 3

Answer 10

yes

Answer 11

thank you all :)

Answer 12

No. of roots = Highest degree of the polynomial.

If they are asking how many real and complex you cannot say that by just looking. you have to factorize and see then

Answer 13

buutt x^2 +1 = 0 roots!

Answer 14

x^3 has only 1 root, a repeating root

Answer 15

0 real roots

Answer 16

but it asks only about roots in general not just the real

Answer 17

for x^3 you say one root but multiplicity 3 so three roots

Answer 18

How many roots do the following equations have?

-12x2 - 25x + 5 + x3 = 0

A. 2

B. 3

C. 4

D. 5

Answer 19

yes @malkassir

Answer 20

so 3

Answer 21

yes

Answer 22

ok i see, then 3 indeed, just checking because, they can actually be asking you to do some work and see that, that equation really does have 3 real roots

Answer 23

yupe
okay I posted a new question plz check it out