Method E - Column Method

CPD: A Compendium of Mathematical Methods (By Jo Morgan), topic 3.1.5

Column Method: Expand and Simplify (x + 3)(x − 5)

Step 1

Step 1

Write (x + 3)(x − 5) in two rows, in a layout similar to a column multiplication.

Step 2

Step 2

Now start by multiplying the x + 3 by −5.

Step 3

Step 3

Next, multiply the x + 3 by x.
When you write your answer, make sure you line up the x terms with the x terms in the previous line.

Step 4

Step 4

Now add the two products, column by column.

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