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lyzzy7

Simplify (2z – 3)^2. 4z2 – 9 4z2 – 9z 4z2 – 12z – 9 4z2 – 12z + 9

  • one year ago
  • one year ago

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  1. jim_thompson5910
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    |dw:1363334232850:dw|

    • one year ago
  2. jim_thompson5910
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    go ahead and fill that table out for me please

    • one year ago
  3. lyzzy7
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    |dw:1363334283151:dw|

    • one year ago
  4. jim_thompson5910
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    very good

    • one year ago
  5. jim_thompson5910
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    now add up all the terms in the 4 boxes and combine like terms (if possible) \[\Large 4z^2 + (-6z) + (-6z) + 9\] \[\Large 4z^2 - 6z - 6z + 9\] \[\Large 4z^2 - 12z + 9\]

    • one year ago
  6. jim_thompson5910
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    so \[\Large (2z-3)^2 = 4z^2 - 12z + 9\] for all values of z

    • one year ago
  7. lyzzy7
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    so its 4z^2-12z+9, correct?

    • one year ago
  8. jim_thompson5910
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    correct

    • one year ago
  9. lyzzy7
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    thanks again:) you're a genius

    • one year ago
  10. jim_thompson5910
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    you're welcome

    • one year ago
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