69. Evaluate ( a + 1) 2 - 5 when a = -3

Step-by-step explanation:

( a + 1) 2 - 5

(Putting value of a = -3)

=> (-3 + 1) 2 - 5

=> -2 × 2 - 5

=> -4 - 5

=> - 9 (Ans)

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:

there is nothing below so i cannot

step-by-step explanation: