Question

please,
can anyone find me the answer of these both ques.....
correctly.....

Answer 1

Hey mate!

Here is yr answer.....


7.

Given,

x+y+z = 0

x³+y³+z³ = ??

As we know,

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

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

x³+y³+z³ -3xyz = 0

x³+y³+z³ = 3xyz


8.

p(x) = 3x+1 , x = -1/3


p(-1/3) = 3(-1/3)+1

p(-1/3) = -1+1

p(-1/3) = 0



Hope it helps....


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