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Start with the given equation
Add 10 to both sides
Factor out the leading coefficient 2. This step is important since we want the
coefficient to be equal to 1.
Take half of the x coefficient -7 to
Add this result (12.25) to the expression
inside the parenthesis. Now the expression
is a perfect square trinomial. Now add the result
(remember we factored out a 2) to the right side.
and 2 to get
Combine like terms on the right side
Divide both sides by 2
Take the square root of both sides
to both sides to isolate x.
Combine the fractions