if 2x+y=5 then prove that 8x^3+y^3+30xy+125=0
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jasim69:
not x+2y=5..
oh i m sorry
it's ok can u do it with 2x+y=5
tommoraw is my exam I have this question a big doubt
thank you for helping me
ok
ok
2x+y=-5,
2x+y+5=0,
if a³+b³+c³=0,then a³+b³+c³=3abc,
So, 2x³+y³+5³=2x×3×y×5
8x³+y³+125=30xy
8x³+y³+125-30xy=0
2x+y+5=0,
if a³+b³+c³=0,then a³+b³+c³=3abc,
So, 2x³+y³+5³=2x×3×y×5
8x³+y³+125=30xy
8x³+y³+125-30xy=0
may be this is helpful for u
are u sure this question may be right
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