Question

if one by two is a root of X square + kx minus 5 by 4 equal zero find k

Answer 1

if 1/2 is the root of given equation then it will satisfy the equation so put x=1/2 in the equation x2 +kx-5/4=0

1/2*2+k*1/2-5/4=0

1+k/2=5/4

k/2=5/4-1

k/2=1/4

k=1/2 Ans

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