Which ordered pair is on the graph of the function? a. (2, 1) b. (4, 2) c. (3, -7) d. (5, 10)
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ANSWER
We need to add half the coefficient of all square.
EXPLANATION
Given the equation,
.
We compare to the general equation,
This means that;
To complete the square we add,
That is .
Hence the number to be added to both sides is .
Note that before we complete the square, the coefficient of the term in must always be 1.