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AP EAMCET2009MathematicsProperties of Triangles

In any A B C, a(b C-c B) equals

Options

  1. Ab^2+c^2
  2. Bb^2-c^2
  3. C1 b + 1 c
  4. D1 b^2 - 1 c^2

Correct answer

B. b^2-c^2

Step-by-step solution

aligned a(b C-c B) & =a b C-a c B & = a^2+b^2-c^2 2 - a^2+c^2-b^2 2 & =b^2-c^2 aligned

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