Question

If 1/2 is the root of x^2+kx-5/4. Find k

Answer 1

Answer:

x=1/2

(1/2)²+k(1/2)-5/4=0

1/4+k/2=5/4

1+2k/4=5/4

1+2k=5

2k=5-1

2k=4

k=4/2=2

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