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anonymous

  • one year ago

Which shows 602 - 402 being evaluated using the difference of squares method? (4 points) 602 - 402 = (3600 + 1600)(3600 - 1600) = 10,400,000 602 - 402 = 3600 - 1600 = 2,000 602 - 402 = (60 - 40)2 = 202 = 400 602 - 402 = (60 + 40)(60 - 40) = (100)(20) = 2,000

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  1. anonymous
    • one year ago
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    i'll give a medal for the first one who ever helps

  2. welshfella
    • one year ago
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    a^2 - b^2 = (a + b)(a - b)

  3. welshfella
    • one year ago
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    now plug in a = 60 and b = 40 and what do you get?

  4. anonymous
    • one year ago
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    ? dont have a calculator on me sorry

  5. welshfella
    • one year ago
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    you dont need one replace a by 60 and b by 40 and you'll find your answer 60^2 - 40^2 = (60 +_____)(60 -____)

  6. welshfella
    • one year ago
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    can you fill in the blanks

  7. anonymous
    • one year ago
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    can you walk me through this i am a little confused

  8. welshfella
    • one year ago
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    the general identity for the difference of 2 squares is a^2 - b^2 = ( a + b)( a - b) where a and b are 2 numbers if you replace a by 60 and b by 40 you'll be able to work out the answer

  9. welshfella
    • one year ago
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    60^2 - 40^2 = (60 +_____)(60 -____) = ?

  10. anonymous
    • one year ago
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    (60+60)(60-40)??

  11. welshfella
    • one year ago
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    no the second number in first parentheses is b and b = 40

  12. anonymous
    • one year ago
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    so the last answer

  13. anonymous
    • one year ago
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    D right ?

  14. welshfella
    • one year ago
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    60^2 - 40^2 = (60 +__40___)(60 -_40___)

  15. welshfella
    • one year ago
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    yes

  16. welshfella
    • one year ago
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    a^2 - b^2 = (a + b)(a - b) remember this and you can do any difference of squares problem

  17. anonymous
    • one year ago
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    thank you so much for helping me with this you gave me a step by step process that i now understand thanks again

  18. anonymous
    • one year ago
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    can you help me on another problem?

  19. welshfella
    • one year ago
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    for ex ample 100 - 81 = 10^2 - 9^2 = (10+9)(10-9) = 19*1 = 19

  20. welshfella
    • one year ago
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    yes but plz post it separately

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