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SOVA2 [1]
3 years ago
10

Please answer and explain your reasoning thanks!

Mathematics
2 answers:
Alla [95]3 years ago
7 0
The first one is the correct answer.
When you multiply, you end up with 49x^16+28xy^40-28x^40 -16y^64
The two middle terms cancel out so you end up with 49x^16-16^64.
Ksju [112]3 years ago
5 0
a^2-b^2=(a-b)(a+b)

This formula will be useful in helping us factor this.

49x^{16}-16y^{64}

This is the equation that we are going to factor.
Let's first change this equation to have the form a^2-b^2

In order to do that, here are two important exponent rules that was used.
(a^b)^c=a^{bc}
(ab)^c=a^c b^c

With those rules, we can change the equation into the following:
(7x^8)^2-(4y^{32})^2

Refer back to the formula I showed in the beginning of this answer.
a^2-b^2=(a-b)(a+b)

(7x^8)^2-(4y^{32})^2=(7x^8-4y^{32})(7x^8-4y^{32})

Thus, your answer is the first choice. Hope this helps! :)
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<em></em>

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