What are the possible values of x in x2 + 3x + 3 = 0?

What is the measure of ac? 5 units 13 units 26 units 39 units 3x- 2b 6x + 9

Me. i can't figure out this question. give an explanation too. .

Campus rentals rents 2 and 3 bedrooms apartments for $700 ans $900 a month respectively. last month they had six vacant apartments and reported $4600 in lost rent. how many of each type of apartment were vacant?