Solve open parentheses square root of 7 close parentheses to the 6 x power = 49x−6.

x = negative 21 over 2
x = −6
x = negative 6 over 5
x = −12

Option D is correct.

x = -12

Step-by-step explanation:

Solve:  

We can write 49 as:

using exponent rules:

Apply this rules on the given equation:

Simplify:

On comparing both sides we get;

Subtract 2x from both sides we get;

x = -12

Therefore, the value of x is -12

a) 15/7

step-by-step explanation:

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: