1. Questions

Algebra 2

Multiply (x-1)(x^2-2x+4)

Simplify (2+i)(2-i)

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Christian

  1. Multiply x by each term in x^2-2x+4
    Then multiply -1 by each term in x^2-2x+4.
    Then add up all terms.
    Then collect all the x^3, x^2, x and constant terms. For example, you should have two x^2 terms: -2x^2 and -x^2. Combine them and write them as -3x^2.

    (2+i)(2-i) = 4 - i^2 = 4 - (-1) = ?

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    drwls

  2. Just to see if I calculated correctly the first problem = x^3-3x^2+6x-4.
    Then the answer to the other problem is 5.

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    Christian

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