21 and 84
(x - 7)(x - 3)
21 is the largest factor of 21
The greatest factor of 21 and 16 is 21, which is a factor of 21 but not of 16.
The greatest common factor of 21 and 63 is 21.Since 21 is a factor of 63, it is automatically the GCF.
21
A + 9 = 21 A = 21 - 9 A = 12
-9
(z=-3) and (z=7)
(x - 7)(x - 3)
21 and 84
x2 - 4x - 21 = (x-7)(x+3)
32
0.5x=18 x=36
-30x=6.3 x=-.21
5
3x-6 = 21 3x = 21+6 x = (21+6)/3 x = 9 You shouldn't ask us to solve your math homework.