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Question

Determine whether x=-1 is a root of the equation x23x+2=0 or not.


Solution

If the value of x=-1 satisfies the equation .
Then the value is the root of the equation.
so
open parentheses negative 1 close parentheses squared minus 3 open parentheses negative 1 close parentheses plus 2 1 plus 3 plus 2 6 not equal to 0

hence x=-1 is not the root
 

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