Q: What is 21 x 21?

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let X = number X + 1/2 X = 21 1.5 X = 21 X = 14

The GCF of 21 and 84 is 21. Since 21 is a factor of 84, it is automatically the GCF.It is: 21

1 x 21 3 x 7 7 x 3 21 x 1

7 x 3 = 21.Its simple! You just times 7 by 2, then to make it easy, you just add on 7. Updated from 'You Smell' to '7 x 3 = 21' by GalaxyRadio9 ;) x!

There are two factor pairs of 21: 21 = 1 x 21 21 = 3 x 7

Related questions

1 x 21 = 21 2 x 21 = 42 3 x 21 = 63 4 x 21 = 84 5 x 21 = 105 6 x 21 = 126 7 x 21 = 147 8 x 21 = 168 9 x 21 = 189 10 x 21 = 210 11 x 21 = 231 12 x 21 = 252 ...

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Two specific cases of pairs of numbers whose product is 21 are: 1 x 21 and 3 x 7. The ratio of their sum to their difference is: 1 x 21 ... (21+1):(21 - 1) = 22:20 = 11 : 10, and 3 x 7 ... (3+7):(7-3) = 10:4 = 5 : 2. To find a general formula, let the larger number be x and the smaller be 21/x. Their sum is x + 21/x = (x^2 +21)/x Their difference is x - 21/x = (x^2 -21)/x Ratio of sum to difference is [(x^2+21)/x] / [(x^2-21)/x] = [(x^2+21)/x] * [x/(x^2-21)] = (x^2+21)/(x^2-21) Check: This formula produces the results found above.

21 = 1 x 21, 3 x 7, 7 x 3, 21 x 1.

21 = 1 x 21, 3 x 7, 7 x 3, 21 x 1

1 x 21, 3 x 7, 7 x 3, 21 x 1

1 x 21, 3 x 7, 7 x 3, 21 x 1

X+14=-21 X=-21-14 X=-35 is your answer.

They are:1 x 212 x 213 x 214 x 21....48 x 2149 x 2150 x 21

The answer is that the value of x is -21

1 x 21, 3 x 7 = 21

3 x 7 x 7 x 11 x 13