Q12 of 84 Page 4

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

Given :- x4+=119


Using, (a+b)2 = a2 + b2 +2ab, we get



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10

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

 11

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

 13

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

 14

Evaluate each of the following :

(i) 1113-893


(ii) 463+343


(iii) 1043+963


(iv) 933-1073