Question

Determine the values of x in the equation x2 = 81.

A. x = −9
B. x = ±9
C. x = ±40.5
D. x = 40.5

Answer 1

The Answer Is C X = 40.5

Step-by-step explanation: Half of 81 = 40.5 and 40.5 x 2 = 81 (x only multiplies 40.5 by 2 which equals 81)

Answer 2

B.

There are two answers because 9x9=81 and (-9)x(-9)=81.