Quick Computing Company produces calculators. They have found that the
cost, c(x), of making x calculators is a
quadratic function in terms of x.
The company also discovered that it
costs $19.50 to produce 3 calculators,
$47.50 to produce 7 calculators, and
$105 to produce 12 calculators.
Complete the function that represents the cost c(x), to produce x calculators