evaluate using identities
(a) (-19)^3 + 10^3 + 9^3
(b) (1.93)^3
+ (0.07)^3
- (2)^3
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(a) (-19)^3= -6859
10^3. = 1000
9^3. =. 729
-6859+1000+729
-6859+1729
-5130 - answer
(b) 1.93^3 =7.189057
0.07^3=0.000343
2^3=8
7.189057+0.00343-8
7.192487-8
-0.807513 - answer
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