Calculate 3ab + b for a=2 and b=-3

At a sale this week, a desk is being sold for $213. this is a 29% discount from the original price. what is the original price?

For problems 29 - 31 the graph of a quadratic function y=ax^2 + bx + c is shown. tell whether the discriminant of ax^2 + bx + c = 0 is positive, negative, or zero.

Which equation is y = -6x2 + 3x + 2 rewritten in vertex form?