Originally Posted by
Moon Hoplite Hi,
Q1. Fit a quadratic polynomial to the points (1,4), (3,8), (-2,8) by writing the general equation, setting up and solving a system of 3 linear equations.
Use technology to graph the polynomial over the interval x = -4 to x = 4. Add the given points to confirm that the curve you found is correct, by hand.
ok i understand this question, i subbed in the points and ended up with 3 equations, thus leading to the gaussian elimination matrix:
4 = a + b + c
8 = 9a + 3b + c
8 = 4a - 2b + c
through the steps i got the answer C = 41, b = -9, a = -2/5
it was rough, is this correct?
thanks
moon