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Polynomials — Maths STD 9 — Question

Gujarat BoardEnglish MediumSTD 9MathsPolynomials1 Mark
MCQ
The value of $(249)^2 - (248)^2$ is:
  • A
    $249$
  • B
    $1$
  • ✓
    $497$
  • D
    $248$
✓

Answer

Correct option: C.
$497$

$ (249)^2 - (248)^2$
$= (249 + 248) (249 - 248) [$Using identity $a^2 - b^2 = (a + b) (a - b)]$
$= 497 × 1$
$= 497$

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