IDNLearn.com: Your go-to resource for finding precise and accurate answers. Our experts provide prompt and accurate answers to help you make informed decisions on any topic.
Sagot :
To simplify the expression [tex]\(\sqrt[3]{56 x^7 y^5}\)[/tex], let's work through the steps systematically:
1. Factor 56 into a product including a perfect cube:
[tex]\[ 56 = 8 \times 7 \][/tex]
Note that [tex]\(8\)[/tex] is a perfect cube since [tex]\(8 = 2^3\)[/tex].
2. Factor [tex]\(x^7\)[/tex] into a product involving perfect cubes:
[tex]\[ x^7 = (x^6) \cdot x = (x^2)^3 \cdot x \][/tex]
Here, [tex]\( (x^2)^3 \)[/tex] is a perfect cube.
3. Factor [tex]\(y^5\)[/tex] into a product involving perfect cubes:
[tex]\[ y^5 = (y^3) \cdot y^2 = y \cdot (y^2)^3 \][/tex]
Similarly, [tex]\((y^2)^3\)[/tex] is a perfect cube.
4. Combine all terms under the cube root, factoring out perfect cubes:
[tex]\[ \sqrt[3]{56 x^7 y^5} = \sqrt[3]{8 \cdot 7 \cdot (x^2)^3 \cdot x \cdot y \cdot (y^2)^3} \][/tex]
5. Extract the perfect cubes from under the cube root:
[tex]\[ = \sqrt[3]{2^3 \cdot 7 \cdot (x^2)^3 \cdot x \cdot y \cdot (y^2)^3} = \sqrt[3]{2^3} \cdot \sqrt[3]{(x^2)^3} \cdot \sqrt[3]{(y^2)^3} \cdot \sqrt[3]{7xy} = 2 \cdot x^2 \cdot y \cdot \sqrt[3]{7xy^2} \][/tex]
So, the simplified form of [tex]\(\sqrt[3]{56 x^7 y^5}\)[/tex] is:
[tex]\[ 2 x^2 y \sqrt[3]{7 x y^2} \][/tex]
Hence, the correct answer is:
[tex]\[ \boxed{A} \][/tex]
1. Factor 56 into a product including a perfect cube:
[tex]\[ 56 = 8 \times 7 \][/tex]
Note that [tex]\(8\)[/tex] is a perfect cube since [tex]\(8 = 2^3\)[/tex].
2. Factor [tex]\(x^7\)[/tex] into a product involving perfect cubes:
[tex]\[ x^7 = (x^6) \cdot x = (x^2)^3 \cdot x \][/tex]
Here, [tex]\( (x^2)^3 \)[/tex] is a perfect cube.
3. Factor [tex]\(y^5\)[/tex] into a product involving perfect cubes:
[tex]\[ y^5 = (y^3) \cdot y^2 = y \cdot (y^2)^3 \][/tex]
Similarly, [tex]\((y^2)^3\)[/tex] is a perfect cube.
4. Combine all terms under the cube root, factoring out perfect cubes:
[tex]\[ \sqrt[3]{56 x^7 y^5} = \sqrt[3]{8 \cdot 7 \cdot (x^2)^3 \cdot x \cdot y \cdot (y^2)^3} \][/tex]
5. Extract the perfect cubes from under the cube root:
[tex]\[ = \sqrt[3]{2^3 \cdot 7 \cdot (x^2)^3 \cdot x \cdot y \cdot (y^2)^3} = \sqrt[3]{2^3} \cdot \sqrt[3]{(x^2)^3} \cdot \sqrt[3]{(y^2)^3} \cdot \sqrt[3]{7xy} = 2 \cdot x^2 \cdot y \cdot \sqrt[3]{7xy^2} \][/tex]
So, the simplified form of [tex]\(\sqrt[3]{56 x^7 y^5}\)[/tex] is:
[tex]\[ 2 x^2 y \sqrt[3]{7 x y^2} \][/tex]
Hence, the correct answer is:
[tex]\[ \boxed{A} \][/tex]
We appreciate your presence here. Keep sharing knowledge and helping others find the answers they need. This community is the perfect place to learn together. Thanks for visiting IDNLearn.com. We’re dedicated to providing clear answers, so visit us again for more helpful information.