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Factorization — MATHS STD 8 — Question

Gujarat BoardEnglish MediumSTD 8MATHSFactorization1 Mark
MCQ
The value of $99^{2}$ is
  • ✓
    $(90)^{2}+2(90)(9)+(9)^{2}$
  • B
    $(90)^{2}-2(90)(9)+(9)^{2}$
  • C
    $(90)^{2}+(9)^{2}$
  • D
    none of these
✓

Answer

Correct option: A.
$(90)^{2}+2(90)(9)+(9)^{2}$
a
$99^{2}=(90+9)^{2}$
$=(90)^{2}+2(90)(9)+(9)^{2}$

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