Question

iv) If one root of the quadratic equation p2-3p+k=0 is 5 then true value of k is
a) 0
b) 10
c) -10
d) 5​

Answer 1

Answer:

d) 5

Step-by-step explanation:

since the root of the given equation 2p-3p+k=0 is 5

therefore p=5

=> 2(5)- 3(5) +k=0

=> 10-15 +k =0

=> -5+k=0

=> k= 5

Answer 2

Answer:

Given, p²-3p+k=0

Note:- If 5 is one of the root of given quadratic equation then it satisfies the equation.

=> (5)²-3(5)+k=0

=> 25-15+k=0

=> 10 + k = 0

=> k = -10