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alex41 [277]
3 years ago
9

Which products result in a difference of squares? Check all that apply. (x – y)(y – x) (6 – y)(6 – y) (3 + xz)(–3 + xz) (y2 – xy

)(y2 + xy) (25x – 7y)(–7y + 25x) (64y2 + x2)(–x2 + 64y2)
Mathematics
1 answer:
kondaur [170]3 years ago
4 0
<span>difference of squares formula:
</span>a^2<span> – b^</span>2<span> = (a + b)(a – b)

</span>so answers are

<span>(3 + xz)(–3 + xz)
</span><span>(y2 – xy)(y2 + xy)
</span><span>(64y2 + x2)(–x2 + 64y2)
</span><span>

cause
</span><span>(3 + xz)(–3 + xz)
= </span><span>(xz + 3 )(xz - 3)
= x^2z^2 - 9

--------------
</span>(y^2 – xy)(y^2 + xy)
= y^4 -x^2y^2

----------

<span>(64y^2 + x^2)(–x2 + 64y^2)
=</span>(64y^2 + x2)(64 - x^2)<span>
= 64^2 y^4 - x^4</span>
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