Question

x = y2 - 1
2x - y = 4
(3, ) and (, )

Answer 1

quadratic system of equations

Answer 2

i didn't understand the question completely wait

Answer 3

i can post the attachment

Answer 4

please

Answer 5

^^

Answer 6

So you are giving test right ?

Answer 7

no this is an assignment

Answer 8

hmn what you tried ?

Answer 9

well I tried substitution, eliminations,quadratic formula, foiling...anything else and I would lose my mind

Answer 10

foiling sounds like fun...

Answer 11

lol yea FUN!!

Answer 12

xD

Answer 13

ok so u r having problem in steps ...

let me give u 1st stem .. :
\(\huge{x=y^2-1}\) let this equation be 1st ..

and similarly 2x-y be the 2nd

Answer 14

put the value of x in 2nd one..
what u get ?

Answer 15

2(y^2-1)-y=4

Answer 16

Gr8 now simplify it by opening brackets

Answer 17

2y^2-1-y=4

Answer 18

right can u write it as \(2y^2-y-1=4\) ?

Answer 19

ok \[2y^2-y-1=4\]

Answer 20

right transpose -1 to Right Hand Side ( RHS )

Answer 21

\[2y^2-y=5\]

Answer 22

right :

now transpose 5 to Left Hand Side again :

Answer 23

\[2y^2-y-5\]

Answer 24

= ?

Answer 25

\[2y^2-y-5=0\]

Answer 26

right. .. what type of equation is this ?

Answer 27

quadratic

Answer 28

solve this by the following formula :

\[\frac{-b\pm\sqrt{b^2-4ac}}{2a}\]

Answer 29

a = 2 , b= -1 , c=-5

Answer 30

i know im working it out srry if im taking to long

Answer 31

no problem @aussy123 u can take ur time as much u want

Answer 32

\[-1\pm\frac{\sqrt{-41}}{4}\\]

Answer 33

\[-1\pm\frac{\sqrt{-41}}{4}\\] \]

Answer 34

that's right

Answer 35

wait but what does (3, ) mena

Answer 36

thats the coordinates they are looking for

Answer 37

wait i am calling some body good at this... or i am trying...

Answer 38

okay

Answer 39

@dpaInc

Answer 40

(3,2) and (5/4 , -3/2) is what i got

Answer 41

how

Answer 42

wait

Answer 43

u did wrong in some steps ...
\[2(y^2-1)-y=4\]
\[2y^2-2-y=4\]
\[2y^2-y=6\]
\[2y^2-y-6=0\]
\[\textbf{a=2 , b = -1 , c= -6}\]

Answer 44

oh ok I see lol

Answer 45

so shall i think that u have got the answer ?

Answer 46

yea