How will you write 5 x 5 x 5 x 5 x 5 as an exponential expression?

55

5 x 5 x 5 x 5 x 5 is five 5's multiplied by each other; when writing an exponent, use the form Bx, where 'B' is the base(the number being multiplied by itself), and 'x' is the exponent(how many times the base is being multiplied). Here, it would thus be written as 55.