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Maths Problem 2

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Solve y-2x+11=0 and y^2=x^2-7

I got y = -10 1/3 or y = 3

and when y = -10 1/3, x= - 11 1/3 and when y = 3, x = 7
(edited 6 years ago)
Are we treating these two equations as separate or do they intersect or what?
Reply 2
Original post by BTAnonymous
Are we treating these two equations as separate or do they intersect or what?


That's what i dont know either... I just did it as a simultaneous equation. I literally attached all that was given in the image :/
It gives x=4 y=-3
And x=32/3 y=31/3
Original post by its me ritch
That's what i dont know either... I just did it as a simultaneous equation. I literally attached all that was given in the image :/



I'm going to assume we solve them as intersections as we can't solve for y and x in one equation like this so we need to eliminate 1 of the variables: x or y.

I ended up getting x = 32/3 , x = 4

So

y = 3, y = 31/3

As ordinates these are (4,3) and (32/3,31/3)

Subbing (32/3,31/3) satisfies both equations but (4,3) only satisfies y^2=x^2-7?

EDIT: Nevermind, just saw bacon_james' post... I lost a negative sign somewhere ugh well
(edited 6 years ago)
Reply 5
Original post by BTAnonymous
I'm going to assume we solve them as intersections as we can't solve for y and x in one equation like this so we need to eliminate 1 of the variables: x or y.

I ended up getting x = 32/3 , x = 4

So

y = 3, y = 31/3

As ordinates these are (4,3) and (32/3,31/3)

Subbing (32/3,31/3) satisfies both equations but (4,3) only satisfies y^2=x^2-7?

EDIT: Nevermind, just saw bacon_james' post... I lost a negative sign somewhere ugh well


Many thanks guys! Really appreciate it!

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