What are greatest common factors for 49b^6 and 28b^5

Which of the following is the missing term, a2, of the geometric sequence in which a1=2 and a3=200

Ivan began dividing g2  – 6 by g + 1, noting that . he started by placing g in the quotient, as shown below.what is g2  – 6 divided by g + 1? g –  1 –  g + 1  – g  –  7 + g  –  5  + 

Which value is not a solution of 8x^3 – 1 = 0