What is -a^-2 of a =-5. a.-25. b.25. c.-1/25. d.1/25

Given f(x) = 2x^2- 5x+1, determine the function value f(2). do not f(x) = in your answer

Write the expression in simplified radical form. show all steps and work including any foil method work. (hint: use the conjugate. no decimal answers.) (9-2√3)/(12+√3)

Identify the number 127 as a rational or irrational. explain