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GOODMAN

  • 3 years ago

Factor x^2-9

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  1. LagrangeSon678
    • 3 years ago
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    difference of squares Recall : a^2-b^2=(a+b)(a-b)

  2. GOODMAN
    • 3 years ago
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    okay thank you

  3. LagrangeSon678
    • 3 years ago
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    in your case, a=x and b=3

  4. GOODMAN
    • 3 years ago
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    okay so i still don't get it

  5. LagrangeSon678
    • 3 years ago
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    If you have x^2-9 then we can write it as (x)^2-(3)^2 so using that formula a^2-b^2=(a+b)(a-b), we get(x+3)(x-3)

  6. GOODMAN
    • 3 years ago
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    ooohhhhh thanks sir

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