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Factorization — MATHS STD 8 — Question

Gujarat BoardEnglish MediumSTD 8MATHSFactorization1 Mark
MCQ
Tick $(\checkmark)$ the correct answer:
$ab - a - b + 1 = ?$
  • ✓
    $(a - 1)(b - 1)$
  • B
    $(1 - a)(1 - b)$
  • C
    $(a - 1)(1 - b)$
  • D
    $(1 - a)(b - 1)$
✓

Answer

Correct option: A.
$(a - 1)(b - 1)$

$ab - a - b + 1$
$= a(b - 1) - 1(b - 1)$
$= (a - 1)(b - 1)$

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