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JEE Mains · Maths · STD 11 - 4.2 Quadratic equations and inequations

સમીકરણ \(|\mathrm{x}+2|^2+|\mathrm{x}-2|-2=0\) અને સમીકરણ \(x^2-2|x-3|-5=0\) ના મૂળોના વર્ગોનો સરવાળો __________ છે.

  1. A 26
  2. B 36
  3. C 30
  4. D 24
Verified Solution

Answer & Solution

Correct Answer

(B) 36

Step-by-step Solution

Detailed explanation

\begin{aligned} & |\mathrm{x}-2|^2+2|\mathrm{x}-2|-|\mathrm{x}-2|-2=0 \\ & \Rightarrow(|\mathrm{x}-2|+2)(|\mathrm{x}-2|-1)=0 \\ & \Rightarrow|\mathrm{x}-2|=1 \\ & \Rightarrow \mathrm{x}=2 \pm 1=3,1 \\ & \Rightarrow \text { sum of square of roots }=9+1=10 \\ &…

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