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nlexa [21]
4 years ago
8

Which monomials are perfect cubes? Check all that apply.

Mathematics
2 answers:
lozanna [386]4 years ago
6 0
A perfect cube is a number that resulted from multiplying a number three times by itself. A perfect cube is also a number that has an exact cube root.

8x^12 ⇒ 2x^4 * 2x^4 * 2x^4
27x^9 ⇒ 3x³ * 3x³ * 3x³

Only two monomials are perfect cubes.


sergiy2304 [10]4 years ago
6 0

When a number is multiplied by itself three times, then the resultant number is called a perfect cube. It is also a number with an exact cube root.

Out of the given options, 8x^{12} and 27x^{9} are perfect cubes.

8x^{12} = 2x^{4}\times 2x^{4}\times 2x^{4} (2's are multiplied and powers are added)

27x^{9} = 3x^{3}\times 3x^{3}\times 3x^{3} (3's are multiplied and powers are added)

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