2012 · Q27
What is the value of [(2.247)^3 + (1.730)^3 + (1.023)^3 - 3*2.247*1.730*1.023] / [(2.247)^2 + (1.730)^2 + (1.023)^2 - 2.247*1.730 - 1.730*1.023 - 2.247*1.023]?
Elementary MathematicsAlgebra
- A1.730
- B4
- C5
- D5.247
Explanation
Using a^3+b^3+c^3-3abc = (a+b+c)(a^2+b^2+c^2-ab-bc-ca), the expression equals a+b+c = 5.