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(x^3 – y^3)(x^3 + y^3) =

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Math Expert
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Joined: 02 Sep 2009
Posts: 59147
(x^3 – y^3)(x^3 + y^3) =  [#permalink]

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New post 21 Mar 2016, 07:24
00:00
A
B
C
D
E

Difficulty:

  5% (low)

Question Stats:

90% (00:36) correct 10% (00:43) wrong based on 206 sessions

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Marshall & McDonough Moderator
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Joined: 13 Apr 2015
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Re: (x^3 – y^3)(x^3 + y^3) =  [#permalink]

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New post 23 Mar 2016, 09:02
(a + b)(a - b) = a^2 - b^2
a = x^3; b = y^3
Answer: x^6 - y^6 = A
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Re: (x^3 – y^3)(x^3 + y^3) =  [#permalink]

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New post 28 Mar 2016, 03:01
OA : x6-y6

Take X = x^3, Y= y^3
The equation becomes (X-Y)(X+Y).
Using formula, X^2 - Y^2

Now substituting , x^6-y^6
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Re: (x^3 – y^3)(x^3 + y^3) =  [#permalink]

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New post 02 Feb 2019, 20:20
\((a + b)(a - b) = a^2 - b^2\)
\((x^3 – y^3)(x^3 + y^3) =x^6-y^6\)
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Re: (x^3 – y^3)(x^3 + y^3) =   [#permalink] 02 Feb 2019, 20:20
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