Question

Please solve question no.24 in the copy.

Answer 1

solution for you.....

Answer 2

we know that,

x³+y³+z³-3xyz= (x+y+z)(x²+y²+z²-xy-yz-xz)

x+y+z= 0(given that)

x³+y³+z³-3xyz = (0)(x²+y²+z²-xy-yz-xz)

we know that if any number multiplied with 0, Its results will also be 0,

Then,

x³+y³+z³-3xyz= 0

x³+y³+z³= 0+3xyz

x³+y³+z³=3xyz,

Now,

(-12)³+7³+5³

We know that,

x³+y³+z³=3xyz(just proved)

(-12)³+7³+5³= 3 x (-12) x 7 x 5

(-12)³+7³+5³= -1260.


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