Question

The number of real roots of eq 3x^5 + 10x^3 + 30x + 7 =0 ?

Answer 1

@mukushla @experimentX @Ishaan94

Answer 2

Solve it bro

Answer 3

Any clue @alanli123

Answer 4

Or graph it?

Answer 5

then look at x intercepts?

Answer 6

i wabt to solve this manually not by graph

Answer 7

Ok use the rational roots theorem and plug in possible root values

Answer 8

wat is that

Answer 9

bro how old are u

Answer 10

my guess is only one. and that one root should be negative.

Answer 11

i used descartes rule of signs.

Answer 12

hw u guys are using that rule can u teach me that @Ishaan94

Answer 13

i think that method is very easy!

Answer 14

i can link you, http://mathworld.wolfram.com/DescartesSignRule.html.

yes it's quite easy.

Answer 15

it says file not found @Ishaan94

Answer 16

nop i got it

Answer 17

haha really?

try again, http://mathworld.wolfram.com/DescartesSignRule.html

Answer 18

@Ishaan94 that helps a lot.....i am happy that i learnt new concept ....thxx

Answer 19

since there is no change of sign it does not have any + ve roots

Answer 20

is that correct

Answer 21

yes