I have no clue as to how to start this problem.
If ab + bc + ca = 0, then the value of \(\displaystyle \dfrac{1}{a^2\, -\, bc}\, +\, \dfrac{1}{b^2\, -\, ca}\, +\, \dfrac{1}{c^2\, -\, ab}\) will be _____.
A) -1
B) a + b + c
C) abc
D) 0
If ab + bc + ca = 0, then the value of \(\displaystyle \dfrac{1}{a^2\, -\, bc}\, +\, \dfrac{1}{b^2\, -\, ca}\, +\, \dfrac{1}{c^2\, -\, ab}\) will be _____.
A) -1
B) a + b + c
C) abc
D) 0
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