Solved on Feb 01, 2024

Simplify the product of 18\sqrt{18} and 63\sqrt{63}.

STEP 1

Assumptions
1. We need to simplify the product of two square roots.
2. The properties of square roots will be used, including the fact that ab=ab\sqrt{a} \cdot \sqrt{b} = \sqrt{ab}.

STEP 2

We will use the property of square roots that allows us to multiply the radicands (the numbers inside the square roots) together.
1863=1863\sqrt{18} \cdot \sqrt{63} = \sqrt{18 \cdot 63}

STEP 3

Calculate the product of the radicands.
186318 \cdot 63

STEP 4

Perform the multiplication.
1863=113418 \cdot 63 = 1134

STEP 5

Now we have the square root of the product.
1863=1134\sqrt{18} \cdot \sqrt{63} = \sqrt{1134}

STEP 6

Factor the radicand into its prime factors to simplify the square root.
1134=2333371134 = 2 \cdot 3 \cdot 3 \cdot 3 \cdot 3 \cdot 7

STEP 7

Group the prime factors into pairs of equal factors, if possible, to simplify the square root. Each pair of equal factors can come out of the square root as a single factor.
1134=2347\sqrt{1134} = \sqrt{2 \cdot 3^4 \cdot 7}

STEP 8

Since 34=(32)2=923^4 = (3^2)^2 = 9^2, we can take 32=93^2 = 9 out of the square root.
1134=2927\sqrt{1134} = \sqrt{2 \cdot 9^2 \cdot 7}

STEP 9

Take the square of 9 out of the square root.
1134=927\sqrt{1134} = 9\sqrt{2 \cdot 7}

STEP 10

Multiply the remaining factors inside the square root.
1134=914\sqrt{1134} = 9\sqrt{14}

STEP 11

Write the final simplified product.
1863=914\sqrt{18} \cdot \sqrt{63} = 9\sqrt{14}
The product in its simplest form is 9149\sqrt{14}.

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