posted by Jon .
Assume that no denomenator equals 0.
What exactly is your question? I don't even see a denominator anywhere :)
What you have is right so far. If you want to finish that question you need to use the quadratic formula
x = (-b +/- square root(b^2 - 4ac)) / 2a
x = (5 +/- square root (25 + 192)) / 16
x = (5 +/- square root (217)) / 16
which yields x1 = 1.23 and x2 = -0.61
(7x^2+3x-9)-(-x^2+8x-3) is the question. the rest is my work
Your solution is perfect, did you just want confirmation?