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lbvjy [14]
3 years ago
13

Which expression is equivalent to 64y^18-1000z^6?

Mathematics
1 answer:
Shalnov [3]3 years ago
8 0

For this case we must find an expression equivalent to:64y ^ {18}-1000z ^ 6

Then, we take common factor 8:

8 (64y ^ {18}-125z ^ 6) =

By definition of power properties we have to:

(a ^ n) ^ m = a ^ {n * m}

So:

8 ((2y ^ 6) ^ 3- (5z ^ 2) ^ 3)

Since both terms are perfect cubes, we factor using the cube difference formula:

(a ^ 3-b ^ 3) = (a-b) (a ^ 2 + 2ab + b ^ 2)

Where:

a = 2y ^ 6\\b = 5z ^ 2

So:8 (2y ^ 6-5z ^ 2) ((2y ^ 6) ^ 2 + 2 (2y ^ 6) (5z ^ 2) + (5z ^ 2) ^ 2) =\\8 (2y ^ 6-5z ^ 2) (4y ^ {12} + 10y ^ 6z ^ 2 + 25z ^ 4)

Answer:

8 (2y ^ 6-5z ^ 2) (4y ^ {12} + 10y ^ 6z ^ 2 + 25z ^ 4)

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