Discover Questions

7^(x+1) + 7^x + 7^(x-1) = 399, what is x? Find the complement of the angle 3pi/7. Please show steps!? Find all of the actual roots of the polynomial: x^3 - 2x^2 + 5x + 26 = 0? Name a class of annelids whose members may have protonephridia? Make a conjecture about the next item in the sequence.1, -4, 9, -16,?