Math, asked by archanas1911, 13 hours ago

Elimination method
x+y=8
x-y=7

Answers

Answered by darp2722

1

Answer:

Since, (x+y)

3

=x

3

+y

3

+3xy(x+y)

∴x

3

+y

3

=(x+y)

3

−3xy(x+y)

Given, x+y=8 and xy=7

⇒x

3

+y

3

=(8)

3

−3(7)(8)

=512−168=344.

Step-by-step explanation:

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