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anonymous

  • 5 years ago

how do i do problems like (y+5)(y+2)+0?

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  1. anonymous
    • 5 years ago
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    I think you mean =0. And recall that if (y+a)(y+b) = 0 then either y+a = 0 or y+b = 0.

  2. anonymous
    • 5 years ago
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    yes, i meant =0 but i still have no idea what ur saying!

  3. anonymous
    • 5 years ago
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    i mean..i know what you mean, but that doesn't help really

  4. anonymous
    • 5 years ago
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    well, if y+5 = 0 what is y ?

  5. anonymous
    • 5 years ago
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    -5?

  6. anonymous
    • 5 years ago
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    Yep. Now if y+2 = 0 what is y?

  7. anonymous
    • 5 years ago
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    -2

  8. anonymous
    • 5 years ago
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    Right, so the solutions to (y+5)(y+2) = 0 are y = -5 and y = -2

  9. anonymous
    • 5 years ago
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    If y is either of those values, the expression (y+5)(y+2) will equal 0.

  10. anonymous
    • 5 years ago
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    dont you have to foil or whatever?

  11. anonymous
    • 5 years ago
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    No, you can solve by inspection.

  12. anonymous
    • 5 years ago
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    i just typed this huge long question and then checked your answer in the back of my math book, and you were right! thanks!

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