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Nickie_S

  • 4 years ago

Factor the expression 49x^2 -42xy+9y^2 into a product of binomials. So far I have (7x-9y)(7x-9y) I think the 9y is wrong but I do not know what to change it to then? Help?

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  1. abtrehearn
    • 4 years ago
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    That's a perfect square trinomial, and it factors to\[(7x - 3y)^{2}.\]

  2. Nickie_S
    • 4 years ago
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    I was just thinking maybe that last part is -3y. How would I show my work on this? Do I check it by doing FOIL?

  3. abtrehearn
    • 4 years ago
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    Yes, you can check by the FOIL method.

  4. Nickie_S
    • 4 years ago
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    Ok Thank you for your help!

  5. abtrehearn
    • 4 years ago
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    :^)

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