4-2.Quadratic Equations and Inequations
hard

સમીકરણ $\left|x^2-8 x+15\right|-2 x+7=0$ ના તમામ બીજનો સરવાળો $...........$ છે.

A

$9+\sqrt{3}$

B

$11+\sqrt{3}$

C

$9-\sqrt{3}$

D

$11-\sqrt{3}$

(JEE MAIN-2023)

Solution

For $x \leq 3$ or $x \geq 5$

$x^2-8 x+15-2 x+7=0$

$x=5+\sqrt{3}$

For $3 < x < 5, x^2-8 x+15+2 x-7=0$

$x =4$

Hence sum $=9+\sqrt{3}$

Standard 11
Mathematics

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