How do you calculate a^5 x a^16 / a^4?

When each term has the same base, add the indices that are multiplied. Then subtract the indices that are divided.

a^5 x a^16 / a^ 4 = a^(5+16) / a^4 

                            = a^ 21 / a^4

                            = a^(21-4)

                            = a^17

EP

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Factorise x^2+6x+5=0 by completing the square.


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How to complete the square to find the value of x?


A solution to the equation 2x^2-3x-17=0 lies between 2&3 use method of trail and improvement to find the solution