Question

find x and y intercepts of...
y-x^2=7x ??

Answer 1

Same, put 0 for y to get x intercept, 0 for x to get y intercept

Answer 2

i did...

0-x^2=7x

i just dont know whee to go from there!

Answer 3

Move -x^2 to the other side

0=x^2+7x

now factor

Answer 4

0-x^2=7x
+x^2 +x^2

0=x^2+7x
x(x+7)

x=0 x=7 ????

Answer 5

Itd be x=0 and x+7=0 so

x=0 and x=-7

Answer 6

oh ok i got it:)

Answer 7

what about y=x^3-7x^2+6x

as gonna use the quadic formula?

Answer 8

Are you still trying to find x and y intercepts?

Answer 9

yes

Answer 10

y=x^3-7x^2+6x = x(x^2 -7x +6) = x(x-6)(x-1)
the rest is same as the above process.

Answer 11

so x= 0, 6 ,1 ???

Answer 12

Yep

Answer 13

for y-intercept, yes.

Answer 14

Actually that'd be x intercepts.

Answer 15

o ya, lol

Answer 16

yea x intercepts :)

Answer 17

im imbarrased to ask again lol what about one like y= x^3 / 3x+5 ??

Answer 18

Same idea, x intercept would be

x^3/3x+5=0

Answer 19

from there?

Answer 20

Multiply both sides by 3x+5

x^3=0
x=0

Answer 21

3x+5=x^3 ?

Answer 22

Nope, 3x+5*0=?

Answer 23

i wanna know the steps this is just homework but i got a test in a week i want to know howto do it

Answer 24

Alright, you're dividing by 3x+5 on the left side right? so to undo that you do the opposite operation to both sides...multiplication by 3x+5...it eliminates it from the denominator and 3x+5*0=0

So x^3=0

Answer 25

o ok 0 but you still got the x^3 dont you>

Answer 26

Yep, take the cube root of both sides....
x=0

Answer 27

o......ok thanks again for your help im gona go try and do some of my own ill probably be back in a while if i get stuck on another... thanls :)

Answer 28

you're welcome