Mathematics · Quadratic Equations

JEE Main 2026 — 23 January, Morning Shift — Question 8

If α\alpha and β(α<β)\beta(\alpha<\beta) are the roots of the equation (−2+3)(∣x−3∣)+(x−6x)+(9−23)=0(-2+\sqrt{3})(|\sqrt{x}-3|)+(x-6 \sqrt{x})+(9-2 \sqrt{3})=0, x≥0x \geq 0, then βα+αβ\sqrt{\frac{\beta}{\alpha}}+\sqrt{\alpha \beta} is equal to :

  1. Option A:

    88

  2. Option B:

    99

  3. Option C:

    1010

    Correct
  4. Option D:

    1111

Answer: C

Step-by-step solution

(x−6x+9)−(2−3)∣x−3∣−23=0\quad(x-6 \sqrt{x}+9)-(2-\sqrt{3})|\sqrt{x}-3|-2 \sqrt{3}=0

⇒∣x−3∣2−(2−3)∣x−3∣−23=0\Rightarrow|\sqrt{\mathrm{x}}-3|^{2}-(2-\sqrt{3})|\sqrt{\mathrm{x}}-3|-2 \sqrt{3}=0

⇒∣x−3∣=2 or ∣x−3∣=−3 \Rightarrow|\sqrt{\mathrm{x}}-3|=2 \text { or }|\sqrt{\mathrm{x}}-3|=-\sqrt{3} (not possible)

⇒x=1 or 5\Rightarrow \sqrt{\mathrm{x}}=1 \text { or } 5

⇒x=1 or 5\Rightarrow \mathrm{x}=1 \text { or } 5

⇒α=1\Rightarrow \alpha=1 and β=25\beta=25

Let x≥9x \geq 9, let x=t⇒t≥3\sqrt{x}=t \Rightarrow t \geq 3

(3−2)(t−3)+(t−3)2−23=0(\sqrt{3}-2)(t-3)+(t-3)^{2}-2 \sqrt{3}=0 Let t−3=u\mathrm{t}-3=\mathrm{u}

u2+(3−2)u−23=0 \mathrm{u}^{2}+(\sqrt{3}-2) \mathrm{u}-2 \sqrt{3}=0

u=2, or u=−3\mathrm{u}=2, \text { or } \mathrm{u}=-\sqrt{3}

⇒t−3=2\Rightarrow \mathrm{t}-3=2 or t−3=−3\mathrm{t}-3=-\sqrt{3}

⇒t=5\Rightarrow \mathrm{t}=5 or t=3−3 \mathrm{t}=3-\sqrt{3} (rejected)

⇒x=25\Rightarrow \mathrm{x}=25

Now let 0<x<90<\mathrm{x}<9, −(3−2)(t−3)+(t−3)2−23=0-(\sqrt{3}-2)(t-3)+(t-3)^{2}-2 \sqrt{3}=0

let t−3=u\mathrm{t}-3=\mathrm{u}

u2−(3−2)u−23=0 u^{2}-(\sqrt{3}-2) u-2 \sqrt{3}=0

⇒u=3 or u=−2\Rightarrow u=\sqrt{3} \text { or } u=-2

⇒t=3+3\Rightarrow \mathrm{t}=3+\sqrt{3} (rejected) or

t−3=−2\mathrm{t}-3=-2

⇒t=1⇒x=1\Rightarrow \mathrm{t}=1 \Rightarrow \mathrm{x}=1

α=1,β=25\alpha=1, \beta=25

Now βα+αβ=25+25=10\sqrt{\frac{\beta}{\alpha}}+\sqrt{\alpha \beta}=\sqrt{25}+\sqrt{25}=10

Answer key and solution verified before publishing.

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Exam
JEE Main 2026
Subject
Mathematics
Chapter
Quadratic Equations
Topic
Location of roots of a Quadratic Equation
If α and β(α<β) are the roots of the equation (-2+√(3))( √(x)-3… | JEE Main 2026 PYQ with Solution · DhiX AI