You cannot multiply a number by itself to get a negative number. The square root is the number that is multiplied by itself to get the number. So: (positive number) × (positive number) = positive number (negative number) × (negative number) = positive numberīut: (positive number) × (negative number) = negative numberĪs a side issue, this goes some way to explaining why you cannot have the square root of a negative number (there is more about this in our page on Special Numbers and Concepts). When the signs of the two numbers are different, the answer will be negative.
Once you have the numerical answer, then you can apply a very simple rule to determine the sign of the answer: When multiplying or dividing with combinations of positive and negative numbers, you can simplify the process by first ignoring the signs (+/-) and just multiplying or dividing the numbers as if they were both positive. Multiplying and Dividing with Positive and Negative Numbers
Simple Transformations of 2-Dimensional Shapes.Polar, Cylindrical and Spherical Coordinates.Introduction to Cartesian Coordinate Systems.Introduction to Geometry: Points, Lines and Planes.Percentage Change | Increase and Decrease.
