To find numbers that multiply to make -21, one number must be positive and the other must be negative. For example, 3 and -7 multiply together to give -21 (3 × -7 = -21). Other pairs include -3 and 7, or 1 and -21.
21 x 7 49 x 3 147 x 1
3 and 7
The three numbers that can be multiplied together to get 21 are 3, 7, and 1, since (3 \times 7 \times 1 = 21). Other combinations include negative numbers, such as -3, -7, and -1, which also multiply to give 21. Additionally, you can use fractions, like ( \frac{21}{3} ), ( \frac{21}{7} ), and 1.
The numbers are: 1 plus square root of 21 and 1 minus square root of 21
7x3 or 3x7, which is all you can do to multiply to get 21.
21 x 7 49 x 3 147 x 1
3 and 7
The three numbers that can be multiplied together to get 21 are 3, 7, and 1, since (3 \times 7 \times 1 = 21). Other combinations include negative numbers, such as -3, -7, and -1, which also multiply to give 21. Additionally, you can use fractions, like ( \frac{21}{3} ), ( \frac{21}{7} ), and 1.
1 x 42 2 x 21 3 x 14 6 x 7
The numbers are: 1 plus square root of 21 and 1 minus square root of 21
42
7x3 or 3x7, which is all you can do to multiply to get 21.
The numbers are: -1 and -20
The factor pairs of 189 are: 1 x 189 3 x 63 7 x 27 9 x 21
The numbers are: 3 -sq rt of 21 and 3 +sq rt of 21
7 and 21
10.5 x 2=21