HEL Use the quadratic formula to find the solutions.

y=x^2+7x+12

a. x=-8 and x=-6
b. x=3 and x=4
c. x=-3 and x=-4
d. x=8 and x=6

14 pointslet x be the seats in the small van and y the seats in the large van. how many seats does the large van have? a company uses two vans to transport worker from a free parking lot to the workplace between 7: 00 and 9: 00a.m. one van has 9 more seats than the other. the smaller van makes two trips every morning while the larger one makes only one trip. the two vans can transport 69 people, maximum.how many seats does the larger van have?

If the ratio of sum of the first m and n terms of an ap is m2 : n2 , show that the ratio of its mth and nth terms is (2m − 1) : (2n − 1).

Could somebody me with this radical simplification?