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Coordinate Geometry — Maths STD 9 — Question

Gujarat BoardEnglish MediumSTD 9MathsCoordinate Geometry1 Mark
MCQ
The zero of the polynomial (x - 2)2 - (x + 2)2 is:
  • A
    0
  • B
    2
  • C
    1
  • D
    -2
✓

Answer

  1. 0
    Solution:
    (x - 2)2 - (x + 2)2
    = (x - 2 + x + 2) (x - 2 - x - 2) [Using identity]
    a2 - b2 = (a + b) (a - b)
    = (2x) (-4)
    = -8x
    Then the zero is,
    -8x = 0
    ⇒ x = 0

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