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Number systems — Maths STD 9 — Question

Gujarat BoardEnglish MediumSTD 9MathsNumber systems1 Mark
MCQ
On simplification $(3+\sqrt{3})(3-\sqrt{3})$ gives:
  • A
    $-2\sqrt{3}$
  • B
    0
  • C
    16
  • D
    6
✓

Answer

  1. $\frac{1}{8}$
    Solution:
    We know that,
    $(\text{a}+\text{b})(\text{a}-\text{b})=\text{a}^2-\text{b}^2$
    So, here
    $(4+\sqrt{3})(3-\sqrt{3})=3^2-(\sqrt{3})^2$
    $\Rightarrow9-3-6$

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