Question

What is the best way to solve this quadratic: x2 + 3x – 4 = 0

Answer 1

@ganeshie8

Answer 2

hmm it looks like only quadratic formula is the best way

Answer 3

Well I guess it would be best first to check with the discriminant :P

Answer 4

I suggest factoring.

Answer 5

yeah

Answer 6

quadratic formula ofcourse!

Answer 7

lets listen to ganishe

Answer 8

WAIT!!! let me have a try please ^_^

Answer 9

yeah preetha

substitute the values using the quadratic formula solve the equation

Answer 10

x2 + 3x – 4 = 0

Refine:
5x - 4 = 0

Add 4 to both sides:
5x - 4 + 4 = 0 + 4
5x=4

Divide both sides by 5:
\[\frac{ 5x }{ 5 } = \frac{ 4 }{ 5 } \]

Answer:
\[x = \frac{ 4 }{ 5 }\]

Answer 11

The quadratic formula is (-b+-sqrt(b^2 - 4ac))/2a where ax^2+bx+c=0

a=1
b=3
c=-4 substitute values and solve;

Answer 12

@just_one_last_goodbye you gave an answer lol coc lol

Answer 13

Pfft I gave the answer why? because c;' I know @Preetha is very smart to already know the answer

Answer 14

That is fine, I do have a couple of strategies now to use. And I do understand this. Thanks all for jumping in.

Answer 15

yeahhhhh i know k jk

Answer 16

best way is to use common sense :)
we can easily see that x=1 is a root

and sum of roots is -b/a =3
so 1 root is1
another will be 3-1=2

Answer 17

Its actually fascinating how you all have different strategies to solve this - that is very good to know.

Answer 18

No problem Mrs. Ram ^-^ Do I get at least 5 owl bucks? I always wanted to know what it would look like on my account

Answer 19

(:

Answer 20

~sigh~ . - .

Answer 21

WEE THE OWL BUCKS ;-; omg... thank you so much <3 I love u guys so much...

Answer 22

oops i did a silly mistake
sum of roots ==> -b/a=-3
and one root is 1
so other root is -4

Answer 23

it's \[\huge\rm x^2+3x-4=0\] x squared not 2x+3x :=)
`squared` that's what makes it quadratic :=) just_one_last :=)

Answer 24

as suggested above factoring would be great
and AC (headphone :P ) method the best!

Answer 25

Preetha is asking a question!!!??? OMG! The world is ending!!!

Answer 26

Click the sphere.

Answer 27

Or click anywhere on this canvas

Answer 28

\(\color{#0cbb34}{\text{Originally Posted by}}\) @jinxhead20
Preetha is asking a question!!!??? OMG! The world is ending!!!
\(\color{#0cbb34}{\text{End of Quote}}\)
not the first time, she can often be found asking questions to take notes on how people answer them :P

Answer 29

Unfortunately, x2 + 3x – 4 = 0 is not a quadratic equation.