Write the factors of a + b + c3-abc
Answers
Answered by
0
Step-by-step explanation:
ANSWER
We know the identity a 3+b 3+c 3−3abc=(a+b+c)2+b 2+c 2--ab−bc−ca)
Using the above identity taking a=a,b=−b and c=−c, the equation a
3
−b
3
−c
3
−3abc can be factorised as follows:
a
3
−b
3
−c
3
−3abc=(a
3
)+(−b)
3
+(−c)
3
−3(a)(−b)(c)
=[a+(−b)+(−c)][a
2
+(−b)
2
+(−c)
2
−(a×−b)−(−b×−c)−(−c×a)]
=(a−b−c)(a
2
+b
2
+c
2
+ab−bc+ca)
Hence, a
3
−b
3
−c
3
−3abc=(a−b−c)(a
2
+b
2
+c
2
+ab−bc+ca)
Answered by
1
Given =a3 + b 3+ c3-3abc
Let 'x' be the factor
f(x)=0 (after taking x as a factor )
x=0
The factors of this will be
a=b=c=1,2,3,4,−−−−n
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