Chapter 7 - Exponents and Exponential Functions - 7-3 Multipying Powers with the Same Base - Practice and Problem-Solving Exercises - Page 430: 48

$4x^{4}$

The area of a square , Area = $side$ X $side$ Here, $side$ = $2x^{2}$ Hence, Area = $2x^{2}$ X $2x^{2}$ This becomes : Area = $2$ X $2$ X $x^{2}$ X $x^{2}$ = $4x^{2+2}$=$4x^{4}$ (Since the exponents are added while multiplying with the same base) Final result : Area = $4x^{4}$