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If 3x + 2y = -1, then prove that 27x^3...

If `3x + 2y = -1`, then prove that
`27x^3+8y^3+1-18xy = 0`

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KALYANI PUBLICATION-HARDER PRODUCT AND FACTORISATION -EXERCISE
  1. If a + 2b = 4c, then prove that a^3+8b^3-64c^3+24abc=0

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  2. If x = b + c - 2a, y = c + a-2b , z = a + b-2c, then prove that x^3...

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  3. If 3x + 2y = -1, then prove that 27x^3+8y^3+1-18xy = 0

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  4. If x = a^2 - b^2, y = 2ab, z = a^2+b^2, then prove that x^6+y^6-z...

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  5. If x = 658, y = 668, z = 674, then prove that x^3+y^3+z^3-3xyz=39200...

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  6. If a = 37, b = 36, c = 38, then prove that a^3+b^3+c^3-3abc=333

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  7. If x+y+z=6, and xy+yz+zx=12, then prove that x^3+y^3+z^3=3xyz

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  8. If a = x+y, b=x-y and c = x+2y, then show that a^3+b^3+c^3-3abc =7y^...

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  9. If a = x+y, b = y+z, and c = z+x then show that a^3+b^3+c^3-3abc =2(...

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  10. If x = a+p, y = b+p, and z = c+p then show that x^3+y^3+z^3-3xyz ={a...

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  11. If 2s = a + b + c, Then prove that (s-a)^3+(s-b)^3+(s-c)^3-3(s-a)(s-...

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  12. If 2s = a + b + c, then prove that (s-a)^3+(s-b)^3+(s-c)^3+3 abc = s...

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  13. If 2s = a + b + c, then prove that (s-a)^3+(s-b)^3+(s-c)^3+3 abc = s...

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  14. If 2s = a + b + c, then prove that s^3 + (s-2a)^3 +(s-2b)^3 + (s-2c...

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  15. If 3s = 2(a + b + c), then prove that (s-b-c)^3 + (s-c-a)^3 +(s-a-b)...

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  16. If s= x+y+z, then prove that s^3+x^3+y^3+z^3-(s-x)^3-(s-y)^3-(s-z)^3...

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  17. If b+c=10, c+a =16, a+b=20, then prove that a^3+b^3+c^3=2567

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  18. If x = 32, y = -25, and z = -7, Then prove that x^3+y^3+z^3=16800

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  19. If x = 10 , y = 64, and z = 2, then prove that (x+y+z)^3= 438976

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  20. Prove that (3x-2y)^3+(y+2z)^3+(y-2z-3x)^3=3(3x-2y)(y+2z)(y-2z-3x)

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