Question

Solve 3x2 + 4x = 2 with the quadratic equation!
I got -2-+ sqr of 40/3 but I don't see it in the answer choices. help?

Answer 1

quantity of 2 plus or minus square root of 10 all over 6
quantity of negative 2 plus or minus 2 square root of 10 all over 3
quantity of negative 2 plus or minus square root of 10 all over 3
quantity of 4 plus or minus square root of 10 all over 3
these are the answer choices.

Answer 2

for a quadratic eqn
\[Ax^2 + Bx + C = 0\]
the roots are
\[x1 = \frac{ -B + \sqrt( B^2 -4AC) }{ 2A } and x2 = \frac{ -B - \sqrt(B^2-4AC) }{2A }\]

Answer 3

try to solve quadratic equation with above method , u will surely get an answer

Answer 4

can you draw it out cause its hard to understand it this way!!

Answer 5

equation given in the ques is
3x2+4x=2

second step would be
3x2+4x−2=0

comparing above with general equation
u will get A = 3 , B = 4 and C = -2
now just put the values of A,B and C in x1 and x2

Answer 6

I got that and I put -4-+ sqr 4^2-4(3)(-2)/2(3)

Answer 7

just simplify it more
u will surely get your answer

Answer 8

-4 +- (sq rt -4^2 - 4(3)(-2))/2(3)
-4 +- (sq rt 16 + 24)/6
-4 +- (sq rt 30)/6
I don't know...I got this

Answer 9

idk how can you help?

Answer 10

you made a mistake 16 +24 is 40 not 30

Answer 11

oops...your right

Answer 12

@texaschic 101
u have done it correctly
u just hve dne wrong addition
addition should be 24 + 16 = 40

Answer 13

yeah idk what to do afterwards

Answer 14

I got the same thing but how is there a 10?

Answer 15

can we write sqrt(40) as sqrt( 2 * 2 * 10) ?

Answer 16

yeah I guess

Answer 17

oh...yes we can

Answer 18

can we write sqrt(2*2*10) as 2 sqrt (10) ?

Answer 19

sq rt 4 * sq rt 10 = 2 sq rt 10

Answer 20

oh my gosh it makes sense now thanj you so much!!!!!!!!!!!!!!!!

Answer 21

yes thanks...I am so not good at quadratic formula stuff

Answer 22

so the answer is b because we divided by 2...right ?

Answer 23

I thought its c..

Answer 24

no wait it is b..right?

Answer 25

you are right @ninashabrang

Answer 26

your right....I didn't see the 2 in there

Answer 27

oh gosh..okay ahha thanks again

Answer 28

wait. so its c?

Answer 29

yeah it should be c

Answer 30

okay!