Math, asked by Aruj11, 1 year ago

If x+y+2=0, then find the value of x cube + y cube+ 8

Answers

Answered by HappiestWriter012
2
Given,
x + y + 2 = 0
x + y = -2
Cubing on both sides
x³+y³+3xy(x+y) = -8
x³+y³+3xy(-2) = -8
x³+y³+8 = 6xy .


Therefore, Required answer is 6xy .

hope helped!
Answered by TheTotalDreamer
2
Hey,

The  given equation is x+y+2=0     ....(1)

x+y+2=0

x+y=−2

(x+y)3=(−2)^3

x^3+y^3+3xy(x+y)=−8x^3+y^3+3xy*(−2)

=−8x^3+y^3−6xy

=−8x^3+y^3+8

=6xy

HOPE IT HELPS:-))
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