The expression is .

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(a)The two factors have a product of and sum of 1.

(b)Write each factor include the positive or negative sign and variable in an empty square in the box. \ \ \ \ \ \ \ \ \ \ \ \

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(c)Write each factors of for each row and column of the box.

(d)Use the box method to factor as follows:

Place in the top left - hand corner and place in the lower right - hand corner.

Then determine which two factors have a product of and .

Then place these factors in the box.Then find the factors of each row and column.

The factors will be listed on the very top and far left of the box.