Describe the cross section

What is the missing constant term in the perfect square that starts with x^2 -20x

5x−4≥12 or 12x+5≤−4 can you with this problem

Maria found the least common multiple of 6 and 15. her work is shown below. multiples of 6: 6, 12, 18, 24, 30, 36, 42, 48, 54, 60, . . multiples of 15: 15, 30, 45, 60, . . the least common multiple is 60. what is maria's error?