Solve each equation 6=1-2n+5

In simplified exponential notation, the expression a^2•a^-3•a 1/a 0

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.

With number 11 ( show how you got the answer)