Question

2. If the sum of the zeroes of the quadratic polynomial 3r? - kr + 6 is 3, then find the value of k​

Answer 1

Step-by-step explanation:

• Correct option is
• A
• 9
• In a general quadratic equation of form ax
• 2
• +bx+c=0, sum of roots are by
• a
• −b
• .
• In the given quadratic equation, 3x
• 2
• −kx+6=0
• a=3,b=−k,c=6
• Sum of roots =
• a
• −b
• =
• 3
• −(−k)
• =
• 3
• k
• and sum of roots is given 3
• ⇒
• 3
• k
• =3
• ⇒
• k=9