Question

Find the values of $x$ for which the expression $\frac{3x+6}{3x(4x+8)(x-5)}$ is undefined.

• A. $-2$
• B. $-2,5$
• C. $0,-2,5$
• D. $0,2,-5$

Answer 1

The correct option is C $0,-2,5$

Given expression is undefined where its denominator becomes zero.

$3x(4x+8)(x-5)=0$

$\therefore 3x=0,4x+8=0,x-5=0$

$\Rightarrow x=0,x=\frac{-8}{4},x=5$

$\Rightarrow x=0,x=-2,x=5$

Option C is correct.