Zenmo
  • Zenmo
Help with simple arithmetic.
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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Zenmo
  • Zenmo
How does \[3(1-\sqrt{1+t})(1+\sqrt{1+t}) = -3t\] equal -3t? Show how please.
Zenmo
  • Zenmo
My arithmetic is a bit fuzzy in this area. Need a refresher.
Nnesha
  • Nnesha
:=)

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Nnesha
  • Nnesha
\[\huge\rm 3 \color{blue}{(1-\sqrt{1+t})(1+\sqrt{1+t})} = -3t\] hint: \[\huge\rm (a+b)(a-b)=a^2-b^2\] apply this rule for both parentheses (blue part)
Nnesha
  • Nnesha
ahh i see wait a sec hmm
Nnesha
  • Nnesha
oh yeah nvm make sense ?
Nnesha
  • Nnesha
that's what i did first :P but yea remember we should distribute parentheses by negative one and then cancel out 1 |dw:1443969689374:dw|
Nnesha
  • Nnesha
|dw:1443969730628:dw|
Zenmo
  • Zenmo
ok I see it now. Thanks! :)
Nnesha
  • Nnesha
np :=)

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