How can i get the answer 88, 92, or 93 only using the individual numbers 1, 4, 9, and 2?

9² + 4² - 2²

Step-by-step explanation:

9² = 81

81 + 4² (16) = 97

97 - 2² (4) =93

since your problem is x^4 = 81, what you have to undeo is the "to the fourth power" part.

the inverse (opposite operation) of "to the fourth power" is "to the fourth root".

  (x^4) ^ ¼   = 81 ^ ¼  

  81 = 3^4     so (3 ^ 4) ^ ¼   =   3 ^ 1   = 3

by hand: (3 ^ 4) ^ ¼   =   3 ^ (4 x ¼) = 3 ^ 1   = 3   (when you take a power to a power, multiply the exponents.)

or, do it by calculator. one way of finding the fourth root is to use ^ (1/4)

step-by-step explanation:

70 years.

step-by-step explanation: