3tan^2 x+5tan x+2=0

I need the exact value for x=?
and the approximate value for x=?
plessssssssssss

Question

3tan^2 x+5tan x+2=0

I need the exact value for x=?
and the approximate value for x=? 
plessssssssssss

dumbcow · Answer

solve it like a quadratic equation
u = tan x

--> 3u^2 +5u +2 = 0

anonymous · Answer

I tryed it but I couldnt get any silution

dumbcow · Answer

were you able to factor it?

anonymous · Answer

no :(

dumbcow · Answer

ok do you know the quadratic formula?

anonymous · Answer

yeah

anonymous · Answer

i did it

anonymous · Answer

it is either -5+ squr1/6 or
it is either -5- squr1/6

anonymous · Answer

is that right ?

dumbcow · Answer

haha nevermind i misread your answer

anonymous · Answer

yeah after u solve it it will come up to 
-5+ squr1/6 or
it is either -5- squr1/6

anonymous · Answer

hahahahahaha

dumbcow · Answer

ok well sqrt(1) is just 1 so you get
-4/6 = -2/3
-6/6 = -1

anonymous · Answer

so do u know what is the exact value for x and what is the approximate value ?

dumbcow · Answer

to find that we need to sub back in tan(x) for u
$$\tan(x) = -2/3$$
$$\tan(x) = -1$$

anonymous · Answer

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dumbcow · Answer

use calculator and use inverse tan

dumbcow · Answer

alright then :)