-infinity,-8) At least one of the answers above is NOT correct. 1 of the questions remains unanswered. (1 point) Solve the following inequalities. Enter the answers in interval notation. (a) x2+6x-160 Answer: (b) 7x2+2x+8> 0 Answer: 1 Note: If the answer includes more than one interval, write the intervals separated by the "union" symbol, U. If needed, enter as infinity and Note: You can earn partial credit on this problem.