Question

Evaluate the exponential expression: (2x)2nd power −3y2nd power =___, if x = 5 and y = 3.

A.73
B.125
C.-73
D.-125

Answer 1

A. 73

Step-by-step explanation

The given expression is

`(2{x})^(2) - 3{y}^(2)`

We substitute x=5 and y=3 to obtain:

`(2 * 5)^(2) - 3{(3)}^(2) = {10}^(2) - 3 * 9`

This simplifies to,

`= 100 - 27`

`= 73`

The correct choice is A.