Completing the square

x^2-5x-14

Completing the square is normally used when the equation is equal to zero

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if we were to factor, we would get (what 2 number multiply to - 14 and add to - 5 then answer is - 7 and 2)

(x+2) (x-7)

if this was set to zero then the number that would work are - 2 and 7