Question

if -4 is a root of quadratic equation X ² + bx - 4 =0 and the quadratic equation x²+bx+k=0 has equal roots the value of k...​

Answer 1

Step-by-step explanation:

f(-4)= (-4)²+b(-4) -4

0 = 16-4b-4

0= 12-4b

4b = 12

b = 3

x²+3x+k = 0

b²-4ac = 0

9-4k =0

9=4k

k= 9/4

Answer 2

Answer:

this is very easy question so I don't told the solution sorry

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