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AP EAMCET2001MathematicsBasics of Mathematics

8+ 28 + 8- 28 8+ 28 - 8- 28 is equal to

Options

  1. A2
  2. B7
  3. C7
  4. D2

Correct answer

C. 7

Step-by-step solution

aligned & 8+ 28 + 8- 28 8+ 28 - 8- 28 & = [ 8+ 28 + 8- 28 ]^2 (8+ 28 )-(8- 28 ) & = 8+ 28 +8- 28 +2 64-28 2 28 & = 16+2 36 2 2 7 = 16+12 4 7 = 28 4 7 = 7 aligned

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