Q11 of 84 Page 4

If 3x-2y=11 and xy=12, find the value of 27x3-8y3.

Given :- 3x-2y=11 and xy=12.


Using, (a-b)3 = a3 - b3 - 3ab(a-b), we get



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9

If x2+=98, find the value of x3+.

 10

If 2x+3y=13 and xy=6, find the value of 8x3+27y3.

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If x4+=119, find the value of x3-.

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Evaluate each of the following:

(i) (103)3


(ii) (98)3


(iii) (9.9)3


(iv) (10.4)3


(v) (598)3


(vi) (99)3