3x7
I think 7x3 is = to 21
7x3 or 3x7, which is all you can do to multiply to get 21.
You take 3x7+4=25 :)
23 Prime numbers are odd numbers and 21=3x7
3x7 = 21
y = -1/(3x7 + 2x - 9)y = -(3x7 + 2x - 9)-1y' = -(-1)(3x7 + 2x - 9)-2(3x7 + 2x - 9)'y' = (3x7 + 2x - 9)-2(21x6 + 2)y' = (21x6 + 2)/(3x7 + 2x - 9)2
if you do 3x7 and you need to get 6x7 then just do it 2 times
3x7
3(7 + 2) = 3x7 + 3x2 is an example of the distributive law.The distributive law connects multiplication and addition.
2x7 = 14 x7 = 7 3x7 = 3*7 = 21
21
-21
133
41
3x7=21 3 and 7 are prime numbers, so 3x7 is the factor tree of the number 21.
21x1 and 3x7