Solved on Mar 05, 2024

Simplify the expression 824x4+954x48 \sqrt{24 x^{4}}+9 \sqrt{54 x^{4}} by combining like radicals.

STEP 1

Assumptions
1. The variable xx represents a nonnegative real number.
2. The operation to be performed is the addition of two radical expressions.
3. Like radicals can be combined by adding their coefficients.

STEP 2

First, we need to simplify the radicals by factoring the radicands into perfect squares and other factors.
24x4=46x4\sqrt{24x^4} = \sqrt{4 \cdot 6 \cdot x^4} 54x4=96x4\sqrt{54x^4} = \sqrt{9 \cdot 6 \cdot x^4}

STEP 3

Since x4x^4 is a perfect square (as xx is nonnegative), and 44 and 99 are also perfect squares, we can take them out of the square root.
46x4=46x4\sqrt{4 \cdot 6 \cdot x^4} = \sqrt{4} \cdot \sqrt{6} \cdot \sqrt{x^4} 96x4=96x4\sqrt{9 \cdot 6 \cdot x^4} = \sqrt{9} \cdot \sqrt{6} \cdot \sqrt{x^4}

STEP 4

Calculate the square roots of the perfect squares.
4=2\sqrt{4} = 2 9=3\sqrt{9} = 3 x4=x2\sqrt{x^4} = x^2

STEP 5

Substitute the square roots of the perfect squares back into the expressions.
24x4=26x2\sqrt{24x^4} = 2 \cdot \sqrt{6} \cdot x^2 54x4=36x2\sqrt{54x^4} = 3 \cdot \sqrt{6} \cdot x^2

STEP 6

Now, rewrite the original expression using the simplified radicals.
824x4+954x4=8(26x2)+9(36x2)8 \sqrt{24 x^{4}} + 9 \sqrt{54 x^{4}} = 8(2 \cdot \sqrt{6} \cdot x^2) + 9(3 \cdot \sqrt{6} \cdot x^2)

STEP 7

Multiply the coefficients inside the parentheses.
8(26x2)=166x28(2 \cdot \sqrt{6} \cdot x^2) = 16 \cdot \sqrt{6} \cdot x^2 9(36x2)=276x29(3 \cdot \sqrt{6} \cdot x^2) = 27 \cdot \sqrt{6} \cdot x^2

STEP 8

Combine the like radicals by adding their coefficients.
166x2+276x2=(16+27)6x216 \cdot \sqrt{6} \cdot x^2 + 27 \cdot \sqrt{6} \cdot x^2 = (16 + 27) \cdot \sqrt{6} \cdot x^2

STEP 9

Add the coefficients.
16+27=4316 + 27 = 43

STEP 10

Write the final simplified expression.
436x243 \cdot \sqrt{6} \cdot x^2
The simplified expression is 436x243 \sqrt{6} x^2.

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