p²-12p-49=-103 add 49 to both sides p²-12p=-54 take 1/2 of the linear coefient and square it -12 is the linear coefitnt so -12/2=-6, (-6)²=36
add 36 to both sides p²-12p+36=-18 factor perfect square trinomial (p-6)²=-18 square root both sides no solution because we can't squaer anything and get a negative
