if 1/2 is the root of equation x²+px-5/4=0 find p
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(1/2)^2 + p/2 - 5/4 =0
1/4-5/4= -p/2
-p = -2
and p = 2
1/4-5/4= -p/2
-p = -2
and p = 2
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