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Above edited.
hi cooljackiec, a circle with centre at (a,b) and radius r the value of which you will know. If you choose a point outside the circle you will have a value for x and y that cannot work in the equation. So think about the largest x valuie that will give a possible y. bobbym: I'm getting a larger value than yours. LATER EDIT: Whilst sitting in the dentist's chair I reworked this and realised my error. I forgot to divide by 2 when completing the square. I now get the same answer. My apologises. Good news: teeth all OK. Bob cooljackiec: I have added a new post to an old question of yours at http://www.mathisfunforum.com/viewtopic … 35#p279935
Hi cooljackiec;
Find the largest real number x for which there exists a real number y such that x^2 + y^2 = 2x + 2y.
17/4 is what I got too. x by 4 shortcut note: using the usual quadratic notation the midpoint is at b/2a Bob
oh thanks. so it is the chord with (2,0) and (0,8) and the tangent. the radius is 17/4.
post 7 Q1
aggh... i thought 25 + a = 36 and a was 9. the last coordinate is 11/5.
No. You had 33/5 correct before. It's the x coord that was wrong.
is the x coordinate for the reflection problem 9/5??
Are you thinking it must go through (0,0) ?
for the square, how can a line with slope 6 bisect the square?
It looks like you did the correct working and then wrote down the wrong answer.
(7/5, 33/5) i believe.
hi 