Do you mean:
factorise: 27x2-18x-18
best I can get is:
9((3x-2)-2)
18x= 19818x/18 = 198/18x = 11
11x = 20x +1811x-20x=18x(11-20)=18-9x=18x=-2
18(2 - x)
0.003x = 18x = 18/0.003 = 6,000
If you mean: y = -18x+17 then the slope is -18 and the y intercept is 17
THE GCF of 18 and 9 is 9
18 x 0.111111 = 1.999998
53333333
15% of 120 is 18.0.15 x = 18x = 18/ 0.15x = 120
x² - 18x - 4 = o x² - 18x = 4 x² - 18x + (18/2)² = 4 + (18/2)² x² - 18x + 81 = 4 + 81 (x - 9)² = 85 x - 9 = ±√85 x = 9 ±√85 x = 9 + √85 or x = 9 - √85 if you are still confused, i want you to follow the related link that explains the concept of completing the square clearly.
3x**4+18x 3x(x**3+6)
-10-18x