A.) 36

B.) 144

C.) 212

D.) 324

E.) 1296

**Area of a square with side x is 9**

x² = 9

x = 3 {took square root of each side}

**Find the area of a square of side 4x**

(4x)²

= 16x² {squared the 4x}

= 16(3)² {substituted 3 for x}

= 16(9) {evaluated exponent}

= 144 {multiplied}

**B.) 144**

**Ask Algebra House**