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Vikentia [17]
2 years ago
12

Which polynomial identity will prove that 117 = 125 − 8?

Mathematics
2 answers:
Levart [38]2 years ago
7 0
The answer is Sum of cubes :)
777dan777 [17]2 years ago
4 0

Answer:

Difference of cubes.

Step-by-step explanation:

We are asked to find the identify that will prove that 117=125-8.

Polynomial identities are equations that are true and have general applications in our algebra work.

We can see that 125 equals 5^3 and 8 equals 2^3. So polynomial identity used in our given problem is difference of cubes.

Difference of cubes: a^3-b^3=(a-b)(a^2+ab+b^2)

Let us prove that 117=125-8.

We can write right hand side of our given equation as:  

5^3-2^3=(5-2)(5^2+5\times 2+2^2)

125-8=(3)(25+10+4)

117=(3)(39)

117=117  

We can see that left hand side of our equation is equal to right hand side of equation. Hence, proved that difference of cubes will prove our equation equal.


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