5x2+2x+k=0 has one of the root -2 then the value of k is....
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Step-by-step explanation:
it is given that it, s one root is -2 hence it is completely divisible by it
f(x) =5x2 +2x+k=0
f(-2)=5x2+2(-2)+k=0
=10-4+k=0
0 =6+k
-6=k
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