Solving simultaneous equations y = x² - x - 6 and x - y + 2 = 0

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gazza123
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I've got to solver the simultaneous equations
y = x2 - x - 6
and
x - y + 2 = 0


I've tried it four different times and failed each time. :frown:

Cheers.

PS. x2 = x squared
 

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make y the subject of the 2nd one, equate the two, and solve it like a quadratic...?

ie. x+2=x^2-x-6
 
gazza123 said:
I've got to solver the simultaneous equations
y = x2 - x - 6
and
x - y + 2 = 0
I've tried it four different times and failed each time. :frown:
Cheers.
PS. x2 = x squared

From the second equation, y= x+ 2 so the first equation becomes
x+ 2= x2- x- 6 or x2- 2x- 8= 0.
Solve that equation. That's easy to factor. Once you have x, put it into y= x+ 2 to find the corresponding y.