Question

find the this
value of k
​

Answer 1

Answer:

Given that ;

Equation :

x² - 4x + 7 - k = 0

a = 1

b = -4

c = 7 - k

Formula :

Discriminant ( ∆ ) = b² - 4ac

∆ = ( -4 )² - 4 ( 1 ) ( 7 - k )

∆ = 16 - 4 ( 7 - k )

∆ = 16 - 28 + 4k

∆ = - 12 + 4k

- 4k = - 12

k = 12 / 4

k = 3

Value of k = 3

Answer 2

Answer:

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