If the area of a square with side x is 9, what is the area of a square of side 4x?

A.) 36

B.) 144

C.) 212

D.) 324

E.) 1296

A.) 36

B.) 144

C.) 212

D.) 324

E.) 1296

**Area of a square is one side squared, or multiplying length by width, which is the same result.**

x² = 9 {squaring one side of the given square equals 9}

x = 3 {took the square root of each side}

**The measurement of one side of the given square is 3.**

(4x)² {squaring one side of the other square to find the area}

= [4(3)]² {substituted 3, for x, into 4x}

= 12² {multiplied 4 by 3}

= 144 {evaluated the exponent}

**B.) 144**

**Ask Algebra House**