Mathematics · Quadratic Equations

JEE Main 2025 — 8 April, Evening Shift — Question 35

The sum of the squares of the roots of ∣x−2∣2+∣x−2∣−2=0|x-2|^{2}+|x-2|-2=0 and the squares of the roots of x2−2∣x−3∣−5=0x^{2}-2|x-3|-5=0, is

  1. Option A:

    24

  2. Option B:

    30

  3. Option C:

    36

    Correct
  4. Option D:

    26

Answer: C

Step-by-step solution

∣x−2∣2+∣x−2∣−2=0|x-2|^{2}+|x-2|-2=0

⇒(∣x−2∣+2)(∣x−2∣−1)=0\Rightarrow(|x-2|+2)(|x-2|-1)=0

⇒∣x−2∣=1\Rightarrow|x-2|=1

⇒x=3,1\Rightarrow x=3,1

x2−2∣x−3∣−5=0x^{2}-2|x-3|-5=0

x≥3x \geq 3

x2−2(x−3)−5=0x^{2}-2(x-3)-5=0

⇒x2−2x+1=0\Rightarrow x^{2}-2 x+1=0

⇒(x−1)2=0\Rightarrow(x-1)^{2}=0

⇒x=1\Rightarrow x=1 \quad (rejected)

x<3x<3

x2+2(x−3)−5=05x^{2}+2(x-3)-5=05

⇒x2+2x−11=0\Rightarrow x^{2}+2 x-11=0

x=−1±23x=-1 \pm 2 \sqrt{3}

Sum of square of roots

=32+12+(−1+23)2+(−1−23)2=3^{2}+1^{2}+(-1+2 \sqrt{3})^{2}+(-1-2 \sqrt{3})^{2}

=10+(1+12)2=10+(1+12) 2

=36=36

Answer key and solution verified before publishing.

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Exam
JEE Main 2025
Subject
Mathematics
Chapter
Quadratic Equations
Topic
Nature of Roots of Quadratic Equation
The sum of the squares of the roots of x-2 2 + x-2 -2=0 and the… | JEE Main 2025 PYQ with Solution · DhiX AI