Question

please answer this question urgent
class 9 maths

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Answer 1

Step-by-step explanation:

1 answer

x³-5x²+kx+4=0

2³-5(2)²+k(2)+4=0

8-20+2k+4=0

-12+2k=0-4

-12+2k= - 4

2k= -4+12

2k= 8

k=8/2

k=4

b option

2 answer

a option

3 answer

x²-kx+k-2=0

k²-k(k)+k-2=0

k²-k²+k-2=0

k-2=0

k=0+2

k=2

b option