please 6 me a ka answer bata doo please
plz.. help me
plz.. don't do for points
please
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Step-by-step explanation:
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Answer:
a)x³+y³-3xyz+a²(b-c)+3abc=(-7)
b)x²+y²-z²-2ab-2ca+xyz=(-10)
Step-by-step explanation:
a)x³+y³-3xyz+a²(b-c)+3abc
=(1)³+(-1)³-3(1)(-1)(3)+(1)²(-2-2)+3(1)(-2)(2)
=1+(-1)-(-9)+(-4)+(-12)
=1-1+9-4-12
=0+5-12
=(-7)
b)x²+y²-z²-2ab-2ca+xyz
=(1)²+(-1)²-(3)²-2(1)(-2)-2(2)(1)+(1)(-1)(3)
=1+1-9-(-4)-4+(-3)
=1+1-9+4-4-3
=2-9-3
=(-7)-3
=(-10)
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