solve this plz,,,,,,,,
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p(x)= 2x^2+5x+k
a^2+b^2+ab = 21/4
(a+b)^2-2ab+ab = 21/4
(-b/a)^2 -ab =21/4
(-5/2)^2-c/a =21/4
25/4-k/2 =21/4
25/4-21/4 = k/2
k/2=4/4
k= 2
a^2+b^2+ab = 21/4
(a+b)^2-2ab+ab = 21/4
(-b/a)^2 -ab =21/4
(-5/2)^2-c/a =21/4
25/4-k/2 =21/4
25/4-21/4 = k/2
k/2=4/4
k= 2
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