18 ÷ 9 x 2 = (18 ÷ 9) x 2 = 2 x 2 = 4
2
11
x2-7x-18 (x-9) (x+2) x=9 x=-2 X= either 9 or -2
The factors of 18 are 1, 2, 3 , 6, 9 & 18 because: 1 x 18 = 18 2 x 9 = 18 3 x 6 = 18
18 ÷ 9 x 2 = (18 ÷ 9) x 2 = 2 x 2 = 4
18 = 1 x 18, 2 x 9, 3 x 6, 6 x 3, 9 x 2, 18 x 1
18 = 9 x 2, so LCM of 18 & 9 is 18. 8 = 2 x 2 x 2; so 18 & 8 share a common factor of 2, so the LCM = 18 x 2 x 2 = 72.
18 = 1 x 18, 2 x 9, 3 x 6, 6 x 3, 9 x 2, 18 x 1.
2
11
x2-7x-18 (x-9) (x+2) x=9 x=-2 X= either 9 or -2
18 = 1 x 18, 2 x 9, 3 x 6, 6 x 3, 9 x 2, 18 x 1.
The factors of 18 are 1, 2, 3 , 6, 9 & 18 because: 1 x 18 = 18 2 x 9 = 18 3 x 6 = 18
1 x 18, 2 x 9, 3 x 6, 6 x 3, 9 x 2, 18 x 1
1 x 18, 2 x 9, 3 x 6, 6 x 3, 9 x 2, 18 x 1
18 x 1/2 = 18/2, or 9