I'm taking a test soon...I need help remembering this thing. With two variables...it's easy...with three...it's another ballpark.
2006-07-15 12:34:17 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
My calc prof gave us this list, it goes. . . Substitute to reduce to two variables. . . I can't remember the rest, so let me google.
Interchange any two equations of
the system
Multiply (or divide) each side of an
equation by the same nonzero
constant
Replace any equation in the
system by the sum (or difference)
of that equation and a nonzero
multiple of any other equation in
the system
2006-07-15 12:44:28 · answer #1 · answered by X 4 · 1⤊ 0⤋
Are you allowed to use a graphing calculator? If so, the TI 89 can solve those things in a few seconds. It's a bit expensive but if you really want to persue mathematics it's very handy.
I'd recommend solving for one variable in one equation and then substituting that into the others. Cramers rule is probably a waste of time.
2006-07-15 12:49:43 · answer #2 · answered by insideoutsock 3 · 0⤊ 0⤋
I would suggest you use a 3x3 marix. It may take a bit of work to get the hang of it, but in the long run it can speed up your calculations and save time.
2006-07-16 04:19:58 · answer #3 · answered by Brenmore 5 · 0⤊ 0⤋
I find it's always easiest to use a 3x3 matrix.
Check this out for how to use a matrix:
2006-07-15 12:40:47 · answer #4 · answered by MeteoMike 2 · 0⤊ 0⤋