anonymous
  • anonymous
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
Algebra
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
i'll give a medal for the first one who ever helps
welshfella
  • welshfella
a^2 - b^2 = (a + b)(a - b)
welshfella
  • welshfella
now plug in a = 60 and b = 40 and what do you get?

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anonymous
  • anonymous
? dont have a calculator on me sorry
welshfella
  • welshfella
you dont need one replace a by 60 and b by 40 and you'll find your answer 60^2 - 40^2 = (60 +_____)(60 -____)
welshfella
  • welshfella
can you fill in the blanks
anonymous
  • anonymous
can you walk me through this i am a little confused
welshfella
  • welshfella
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
welshfella
  • welshfella
60^2 - 40^2 = (60 +_____)(60 -____) = ?
anonymous
  • anonymous
(60+60)(60-40)??
welshfella
  • welshfella
no the second number in first parentheses is b and b = 40
anonymous
  • anonymous
so the last answer
anonymous
  • anonymous
D right ?
welshfella
  • welshfella
60^2 - 40^2 = (60 +__40___)(60 -_40___)
welshfella
  • welshfella
yes
welshfella
  • welshfella
a^2 - b^2 = (a + b)(a - b) remember this and you can do any difference of squares problem
anonymous
  • anonymous
thank you so much for helping me with this you gave me a step by step process that i now understand thanks again
anonymous
  • anonymous
can you help me on another problem?
welshfella
  • welshfella
for ex ample 100 - 81 = 10^2 - 9^2 = (10+9)(10-9) = 19*1 = 19
welshfella
  • welshfella
yes but plz post it separately

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