Question

How to factorise the following equation:

2x^2 + 5x - 168

Answer 1

@Chad123 Do u know discriminant method?

Answer 2

Could you please show me?

Answer 3

for quadratic equation Ax^2 + Bx+ C
Discriminant, D = sqrt( B^2- 4*A*C)
then roots
x1 = (- B + D)/ 2*A and x2 = (-B - D)/2*A

Answer 4

in the problem it is given 2x^2+5x - 168
So A = 2 , B = 5 and C = -168
first find the discriminant and then roots

Answer 5

@Chad123 can u do it now?

Answer 6

What is the capital D?

Answer 7

D is notation for discriminant

Answer 8

I'll let you know in a second

Answer 9

The discrimant equalled square root of 1033

Answer 10

Could you please show me the steps if you don't mind

Answer 11

u r getting wrong
u show ur steps and i will help u in correcting those steps

Answer 12

Square root 5^2 - 4(2)(-168)

Answer 13

Is that how you do it?

Answer 14

yah

Answer 15

what is your second step?

Answer 16

Adding 25 with 1008

Answer 17

You get square root of 1033

Answer 18

4*2*168 = 1344
add 25 with 1344

Answer 19

No it's equal to 1033

Answer 20

Sorry your right

Answer 21

so u got sqrt(1369) which is 37

Answer 22

now can u find the roots?

Answer 23

And then I plug it into x1 and x2?

Answer 24

yah u will get your required roots

Answer 25

You rock man I'm about to give you a medal

Answer 26

Thanks for all the help

Answer 27

:-P

Answer 28

Ciao :)