Question

$\text{If x = 6 is a zero of quadratic polynomial}3x^2–mx-24,\text{then the value of m is\_\_\_\_}$

• A. 10
• B. 12
• C. 14
• D. 16

Answer 1

The correct option is C 14

$Since,x=6isazeroof3x^2-mx-24,\text{it will satisfy the equation.}$

$\Rightarrow$ $3(6{)}^2–m\times 6-24=0$

$\Rightarrow 108–6m-24=0$

$\Rightarrow m=14$