if one of the roots of quadratic equation x2- - Kx + 27 = 0 is 3 then find the value of' k' .
I am Mr rider 46 here
Answers
Given :
Quadratic equation
x² - kx + 27 = 0
One of its root = 3
To Find :
The value of k.
Concept :
For finding the value of k we have to substitute the value of one of the root of the quadratic equation in that equation after solving the equation we will get the value of k. Finding the value of k:
In the given quadratic equation.
⟶ x² - kx + 27 = 0
Substituting one of its root.
⟶ (3)² - k(3) + 27 = 0
⟶ 9 - 3k + 27 = 0
⟶ 36 - 3k = 0
⟶ 3k = 36
⟶ k = 36/3
⟶ k = 12
∴ The value of k = 12
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