3.1.5

Method E - Column Method

Test yourself

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

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Step 1

  • Write (x + 3)(x − 5) in two rows, in a layout similar to a column multiplication.
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Step 2

  • Now start by multiplying the x + 3 by −5.
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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.
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Step 4

  • Now add the two products, column by column.

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