Question

if one root of quadratic equation x²-7x+k=2 find the value of k​

Answer 1

Answer:

12

Step-by-step explanation:

Since 4 is the root of the given quadratic equation.

∴ It satisfies the given equation

∴ We can put x = 4 in the given quadratic equation

x2 – 7x + k =0 [Given}

∴ 42 – 7(4) + k = 0

∴ 16 – 28 + k = 0

∴ - 12 + k = 0

k = 12

Answer: The value of k is 12

Answer 2

Answer:

k=10

Step-by-step explanation:

as 2 is root of the given quadratic equation

so,for x=2 the given quadratic equation = 0

x²-7x+k=0

(2)²-7(2)+k=0

4-14+k=0

k-10=0