The #NUM! error occurs in Excel formulas when a calculation can’t be performed. For example, if you try to calculate the square root of a negative number, you’ll see the #NUM! error.

In the formula bar, insert the MMULT formula as =MMULT(C10: E12, K6: K8) to return the product of two matrix A-1 (inverse of Matrix A) and B by using its arrays and press Ctrl + Shift + Enter to make it an array formula. This formula returns the values of unknown variables and solves the system of equations.

There are many ways to solve a set of simultaneous linear equations. If we wish to use Excel, the most direct way is to express our problem in matrix notation. The matrix of coefficients for our system of linear equations. Now we’re all set to calculate the solution to our equations.

The MINVERSE function returns the inverse matrix for a matrix stored in an array. Otherwise, the formula must be entered as a legacy array formula by first selecting the output range, entering the formula in the top-left-cell of the output range, and then pressing CTRL+SHIFT+ENTER to confirm it.

Excel finds the other solution if you start with an x-value closer to x = -1. For example, enter the value 0 into cell A2 and repeat steps 5 to 9. To find the roots, set y = 0 and solve the quadratic equation 3×2 – 12x + 9.5 = 0. In this case, set ‘To value’ to 0.

Excel has no built-in function to calculate the nth root of a number. To calculate the nth root of a number, simply raise that number to the power of 1/n. 6. For example, 5 * 5 * 5 or 5^3 is 5 raised to the third power.

In mathematics, the nth root of a number x is represented by /sqrt[n]{x}. Here “n” should be a positive integer, and it represents the degree of the root. X represents the number, which we want to find the root value.

nth root of number

1. =B5^(1/C5) With the POWER function. The POWER function is another way to perform exponentiation in Excel. To get the nth root of a number with POWER, use the number with 1/n for the power argument:
2. =POWER(number,1/n) So for the example shown, the formula in D5 would be:
3. =POWER(B5,1/C5)

You can insert a square root symbol in Excel using only your keyboard, without any additional steps. All you need to do is to hold down the Alt button and then type in the corresponding code for this character. In this case, while holding down the Alt key, press 251 to add a square root.

Follow these steps:

1. Click inside a cell and type the number that you want to square.
2. Select another empty cell in the worksheet.
3. Type =N^2 into the empty cell, in which N is a cell reference that contains the numeric value you want to square.
4. Press Enter to see the result.