Simplify ( square root of 18)( square root of 72)

$(\sqrt{18}) (\sqrt{72})$

Step 1

Combine using the product rule for radicals.

$\sqrt{18 \cdot 72}$

Step 2

Write the expression using exponents.

Multiply $18$ by $72$ .

$\sqrt{1296}$

Rewrite $1296$ as $36^{2}$ .

$\sqrt{36^{2}}$

Pull terms out from under the radical, assuming positive real numbers.

$36$