trying to find x and y intercepts for ...

y=x^2+2.2x+1.21

and

y-x^2=7x

Question

trying to find x and y intercepts for ...

y=x^2+2.2x+1.21

and

y-x^2=7x

hartnn · Answer

hint :To get x-intercept put y=0 in the equation 
to get y-intercept put x=0 in the equation

anonymous · Answer

thanks i know that part lol i just dont know how to go from there...like for the first one i did y=0 then i just used the quadratic formula is that right? i got -1 and -1.2?

hartnn · Answer

x^2+2.2x+1.21 = 0 
this can be factored, 
and -1 ,-1.2 is incorrect

anonymous · Answer

so i cant use the quadratic formula?

hartnn · Answer

those are correct, just be accurate 
-1,-1.21 
(instead of just -1.2)

hartnn · Answer

and u can use formula also

anonymous · Answer

what about the second one i dont know where to start?

hartnn · Answer

did u get y-intercept for 1st  ?

anonymous · Answer

yes i got 1.21

hartnn · Answer

now for 2nd eq.,
put x=0 for y-int.,
y-x^2=7x
y=0
so y-intercept = (0,0)
put y=0 for x-int 
y-x^2=7x
0=x^2+7x
i believe u can solve this

hartnn · Answer

sorry for late reply, i got disconnected

anonymous · Answer

x=0 and x=7?
right because i moved the -x^2 to the right

hartnn · Answer

0 and -7 ?

anonymous · Answer

its ok....and oh yea -7

hartnn · Answer

any more doubts ? all clear ?

anonymous · Answer

nope thank you so much :)

anonymous · Answer

can you help me with a few more though?

hartnn · Answer

i am already helping 2-3 ppl at same time, i'll try though...