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Expand each of the following, using suit...

Expand each of the following, using suitable identities
(i) `(x + 2y+ 4z) ^(2)`
(ii) `(2a - 3b) ^(3)`
(iii) `(-2a + 5b - 3c) ^(2)`
(iv) `((a)/(4) - (b)/(2) + 1) ^(2)`
(v) `( p +1) ^(3)`
(vi) ` (x - (2)/(3) y) ^(3)`

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The correct Answer is:
(i) `x ^(2) + 4y ^(2) + 16 z ^(2) + 4xy + 16yz + 8xz`
(ii) `8a ^(2) - 36a ^(2) b + 54 ab ^(2) - 27b ^(3)`
(iii) `4a ^(2) + 25 b ^(2) + 9x^(2) - 20ab - 30 bc + 12 ac`
(iv) `(a^(2))/(16) + (b ^(2))/(4) +1 - (ab)/(4) -b + a/2`
(v) ` p ^(3) + 3p^(2) + 3p +1`
(vi)` x ^(3) -2x ^(2) y + 4/3 xy ^(2) - (8)/(27) y ^(3)`
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NCERT GUJARATI-POLYNOMIALS AND FACTORISATION -EXERCISE 2.5
  1. Use suitable idntities to find the following products (i) (x +5) (x ...

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  2. Evaluate the following products without actual multiplication. (i) 1...

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  3. Factorise the following using appropriate identities. (i) 16x ^(2) +...

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  4. Expand each of the following, using suitable identities (i) (x + 2y+...

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  5. Factories (i) 25 x ^(2) + 16 y ^(2) + 4z ^(2) - 40 xy + 16 xy - 20xy...

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  6. If a + b +c =9 and ab + bc + ca =26, then find a ^(2) + b ^(2) + c ^(2...

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  7. Evaluate the following using suitable identites. (i) (99) ^(3) " "(...

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  8. Factorise each of the following (i) 8a ^(3) + b^(3) + 12a ^(2) + 6ab...

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  9. Verify (i) x ^(3) + y ^(3) = (x + y) (x ^(2) -xy + y ^(2)) (ii) ...

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  10. Faactorise (i) 27a ^(3) + 64 b ^(3) (ii) 343 y ^(3) -1000 using th...

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  11. Factorise 27 x ^(3) + y ^(3) + z ^(3)-9 xyz using identitiy.

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  12. Verify that x ^(3) + y ^(3) + z ^(3) - 3xyz =1/2 (x + y + z) [(x-y)^(...

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  13. (a) If x + y + z=0, show that x ^(3) + y ^(3) + z ^(3)= 3 xyz. (b) ...

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  14. Without actual calculating the cubes, find the vlaue of each of the fo...

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  15. Gi ven possible expressions for the length and breadth of the rectangl...

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  16. What are the possible polynomial expressions for the dimensions of the...

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  17. If 2 (a ^(2) + b ^(2)) = (a+b)^(2), then show that a =b

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