Question

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

Answer 1

ANSWER

A. 73

EXPLANATION

The given expression is

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

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

$(2 \times 5)^{2} - 3{(3)}^{2} = {10}^{2} - 3 \times 9$

This simplifies to,

$= 100 - 27$

$= 73$

The correct choice is A.