Q6 please solve

Q6 please solve EXERCISE 4 (B) (Taking Sv + 2 al = 3 arid a O Ans. Ans. ; then show that : 7. If a + 2b + c = 0; then show that : as + 8b3 + c3 = 6abc. S. Use property to evaluate : (i) 133 + (—8)3 + (—5)3

actually i do not know
 
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Hope this helps

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A very easy method

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Hope this helps!!

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actually i do not know
?
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This is your answer akbar khan.However, May I know your book's name?

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Easy process

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All the answers are correct
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Proved
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Delhi
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See the example of Rd sharma mathsbook
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it is given that

(a+1/a)^2 = 3

or
( a+ 1/a) = ?3. (2) equation


Also

( a+ 1/a)^2 = 3

or - a^2 + 1/a^2 +2 =3

then ( transpose 2 to subtract 3)

a^2 + 1/a^2 = 3-2

a^2 + 1/a^2 = 1. (3) equation


putting 2 and 3 in 1 we have

a^3 +1/a^3 = ?3 (1-1) = 0

so the answer is 0
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bobo mo
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Answer is 21
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Here is the answer

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a³+1/a³=0
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