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BabaBlast [244]
3 years ago
7

What is the cube root of 27a^12

Mathematics
2 answers:
fiasKO [112]3 years ago
7 0
Cube root of 27 a^12 will be:  3 a^4.
iragen [17]3 years ago
7 0

Answer:

Cube-root defines: A number is a special value that, when used in a multiplication three times, gives that number.

Its symbol is denoted by: \sqrt[3]{}

USing Law of radical:

1. \sqrt[n]{ab}= \sqrt[n]{a} \cdot \sqrt[n]{b}

2. \sqrt[n]{x^n} =(\sqrt[n]{x} )^n =\sqrt[n]{x^n} =x

To find the cube root of 27a^{12} ;

By the definition of cube root

\sqrt[3]{27 a^{12}} = \sqrt[3]{27} \cdot \sqrt[3]{a^{12}} [Using [1]]

we can write 27 as 3 \times 3 \times 3 = 3^3 and a^{12} = (a^4)^3

then;

\sqrt[3]{27 a^{12}} = \sqrt[3]{3^3} \cdot \sqrt[3]{a^{4}^3}

 = 3 \cdot a^4       [ Using [2] ]

therefore, the cube root of 27a^{12} is 3a^4  




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