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# simoultaneous equations watch

1. Find the x cordiantes of the two points hwere the line 2x+y=7 meets the curve x(y-20)=9, giving your answers to 2dp.

I got integer answer so i assume i must of gone wrong, can someone correct me.

cheers
2. i got 13.8 and -0.33 which im very dubious about
3. (Original post by Meat Loaf Rocks)
Find the x cordiantes of the two points hwere the line 2x+y=7 meets the curve x(y-20)=9, giving your answers to 2dp.

I got integer answer so i assume i must of gone wrong, can someone correct me.

cheers
x(7 - 2x - 20) = 9

2x^2 + 13x + 9 = 0

x = [-13 ± √(169 - 72)]/4 = [-13±√97]/4
4. can you show your working so I can get alook at how you did it and how I probably went wrong

cheers
5. sorry you must of posted just before me

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