OK GUYS PLEASE HELP: USE THE INFORMATION PROVIDED TO WRITE THE VERTEX FORM EQUATION OF EACH PARABOLA Y=-12X^2+192X-769 EXPLAIN PLEASE THIS IS A GRADE

2)SOLVE EACH EQUATION BY COMPLETING THE SQUARE : N^2+16N-74=-3

3)SOLVE EACH EQUATION BY FACTORING: 6N^2+48N+90=0