It is a perfect square.
Multiplying a positive and negative number will give a negative result. The result is a negative number.
Multiplying positive numbers will result in a positive number.
When multiplying numbers, the result should have the same number of significant figures as the number with the fewest significant figures.
The result of multiplying numbers is called the product.
When multiplying numbers, the rules for signs are straightforward: the product of two positive numbers is positive, and the product of two negative numbers is also positive. However, when multiplying a positive number by a negative number, the result is negative. In summary, multiplying numbers with the same sign yields a positive result, while multiplying numbers with different signs results in a negative product.
Square numbers are the result of squaring an integer. Squaring means multiplying a number by itself, and this, in turn, is called thus because of the way the area of a square is calculated.
The double of the number you multiplied to two
When multiplying or dividing numbers, the result should have the same number of significant figures as the factor with the fewest significant figures. When adding or subtracting numbers, the result should have the same number of decimal places as the number with the fewest decimal places.
If you multiply 2 prime numbers. the result will never be prime. A prime number is one that has no factors except itself and one. The number specified in the question has as factors the 2 prime numbers cited.
The square of a number is the result of multiplying the number by itself. For example, the square of 3 is 3x3 which is 9.
No, 21 is not a square number. A square number is the result of multiplying an integer by itself, and 21 cannot be expressed as the square of an integer.
When multiplying numbers, count the number of significant figures in each number being multiplied. The result should have the same number of significant figures as the number with the fewest significant figures.