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McGraw Hill Integrated II, 2012

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McGraw Hill Integrated II, 2012 View details

4. Special Products

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Exercise 8 Page 31

Apply the difference of two squares.

a^2-9

Practice makes perfect

Notice that the given expression is the multiplication of conjugates. This allows us to use a shorter method of multiplying the terms than the normal distribution process.

(a-3)(a+3)

(a-b)(a+b)=a^2-b^2

a^2-3^2

Calculate power

a^2-9

Subchapter links

Exercises p.30-33