A) 8.5
B) 8.6
C) 2.82
D) 2.92
Correct Answer: D
Solution :
Let 5.71 = a and 2.79 = b \[\therefore \] Expression \[=\frac{{{a}^{3}}-{{b}^{3}}}{{{a}^{2}}+ab+{{b}^{2}}}=\frac{(a-b)({{a}^{2}}+ab+{{b}^{2}})}{{{a}^{2}}+ab+{{b}^{2}}}\] \[=a-b=5.71-2.79=2.92\]You need to login to perform this action.
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