Question

Which of the following is a situation in which an equation cannot be solved using the quadratic formula? A.) The coefficient of the x^2 term is zero B.) The right hand side of the equation is zero C.) The coefficient of the x term is zero D.) The degree of the polynomial is 2

Answer 1

Recall that the quadratic formula is
x=(-b+/-sqrt(b^2-4ac)/2a
So the formula cannot be used whenever a=0, in other words, the coefficient of the x^2 term is zero.  All other situations do not render the formula inapplicable.