IDNLearn.com is designed to help you find accurate answers with ease. Our platform is designed to provide reliable and thorough answers to all your questions, no matter the topic.

Use the equation [tex]y=\sqrt[3]{27x-54}+5[/tex]. Which is an equivalent equation of the form [tex]y=a \sqrt[3]{x-h}+k[/tex]?

A. [tex]y=-27 \sqrt[3]{x+2}+5[/tex]
B. [tex]y=-3 \sqrt[3]{x+2}+5[/tex]
C. [tex]y=3 \sqrt[3]{x-2}+5[/tex]
D. [tex]y=27 \sqrt[3]{x-2}+5[/tex]


Sagot :

To find an equivalent equation of the form [tex]\( y = a \sqrt[3]{x - h} + k \)[/tex] from the given equation [tex]\( y = \sqrt[3]{27x - 54} + 5 \)[/tex], we need to follow a series of steps to simplify and transform the given equation.

1. Identify the given equation:
[tex]\[ y = \sqrt[3]{27x - 54} + 5 \][/tex]

2. Rewrite the expression inside the cube root by factoring:
Notice that [tex]\( 27x - 54 \)[/tex] can be factored as [tex]\( 27(x - 2) \)[/tex]:
[tex]\[ 27x - 54 = 27(x - 2) \][/tex]

3. Substitute this back into the given equation:
[tex]\[ y = \sqrt[3]{27(x - 2)} + 5 \][/tex]

4. Utilize the property of cube roots:
Recall that [tex]\( \sqrt[3]{a \cdot b} = \sqrt[3]{a} \cdot \sqrt[3]{b} \)[/tex]. Apply this to [tex]\( \sqrt[3]{27(x - 2)} \)[/tex]:
[tex]\[ \sqrt[3]{27(x - 2)} = \sqrt[3]{27} \cdot \sqrt[3]{x - 2} \][/tex]

5. Calculate the cube root of 27:
[tex]\[ \sqrt[3]{27} = 3 \][/tex]

6. Put it all together:
Substitute [tex]\( \sqrt[3]{27} \)[/tex] back into the equation:
[tex]\[ \sqrt[3]{27(x - 2)} = 3 \cdot \sqrt[3]{x - 2} \][/tex]

7. Form the final equivalent equation:
[tex]\[ y = 3 \cdot \sqrt[3]{x - 2} + 5 \][/tex]

Thus, the equivalent equation of the form [tex]\( y = a \sqrt[3]{x - h} + k \)[/tex] is:
[tex]\[ y = 3 \sqrt[3]{x - 2} + 5 \][/tex]

Therefore, the correct option is:
[tex]\[ \boxed{y = 3 \sqrt[3]{x - 2} + 5} \][/tex]