Problem #9 Attemgt #3 Your Answer: 9(a) 9(a) 9(b) Your Mark: 9(3) 9(3) 9G1} Problem #10: Find the two x-values at which the graph of the given function has a horizontal tangent line. (a) y = (x +15)(x2 +122: 45) (h)_x F's +6 Separate your answers with a comma. Problem #10(a.364, 0 Do not include Ix = I in your answer. Enter your answer as asynhoc ,__m_t_ _ ___- m_.nat