Can you please me with the following problems:
Solve by the method of your choice.
x^2+y^2=50
(x-7)^2+y^2=1
I tried to find a variable that I could isolate and I wasnt sure what to mulitply by in order to get a variable to isolate.
x^2+y^2=29
-8x+y^2=41
this is as far as I got:
8(x^2+y^2=29)
now I got:
8x^2+y^2=232
-8x+y^2=41
but I still cant isolate anything.
Watch your multiplication: You have to multiply everything on both sides of the equation by 8, not just one term.
Here you could use substitution. Solve the second equation for x:
Then insert this value of x into the first equation:
It'll take a while, but its doable.
The other way is faster: just subtract both equations again:
etc.
-Dan