Question

if one root of the quadratic equation 3x²-12x+k=0 is 3 then find k​

Answer 1

Answer:

k = 9

Step-by-step explanation:

p(x) = 3x²-12x+k=0

p(3) = 3(3)² - 12(3) + k = 0

      ⇒ 27 - 36 + k = 0

      ⇒ k - 9 = 0

      ⇒ k = 9

Hope this helps.....

Answer 2

Answer:

one root of the equation is 3.

Therefore,

3x^2-12x+K=0

=>3(3) ^2-12(3) +K=0

=>3×9-36+K=0

=>27-36+K=0

=>(-9) +K=0

=>K=9.