hi,
i need to know how to complete this Simultaneous equation:
x+y=2
x^2+2y^2=11
could you please explain it in detail so i fully understand please!
thanks!
You have over 800 postings. So by now you should understand that we do not provide tutorial services. Please post some of your own work on this problem and then explain what you do not understand about the question.
Begin by solving for y in the first equation and substitute in the second.
You could always complete the square or use the formula in such a situation. Remember that not everything will factor.
We have $\displaystyle (3y\pm~)(y\mp~)$
7 is prime, the only factors are 7 and 1.
There are just 4 possibilities. Surely you can manage? You need to find a way of making -4.
Edit: Corrected.