anonymous
  • anonymous
Which of the following is not equivalent to the rational expression when x not equal to 7 ? x^2-49/x-7 A. x-7 B. x+7/x-7 C. 1/x+7 D. x+7
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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misty1212
  • misty1212
HI!!
misty1212
  • misty1212
a rather strangely worded question, which you can interpret as "factor and cancel" does that help?
anonymous
  • anonymous
not really because I suck at math honestly and hi haha

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misty1212
  • misty1212
lol ok lets do it then factor the top, which is \(x^2-49\) the "difference of two squares" \[a^2-b^2=(a+b)(a-b)\] always, so \[x^2-49=(x+7)(x-7)\]
anonymous
  • anonymous
which of the following is equal to the rational expression when x not equal to 7............ I TYPED THE QUESTION WRONG!!!
misty1212
  • misty1212
i knew that since 3 of them are NOT and only one of them IS
anonymous
  • anonymous
yes... sorry
misty1212
  • misty1212
since the numerator is \((x+7)(x-7)\) the entire fraction is \[\frac{(x+7)(x-7)}{x-7}\] now cancel
anonymous
  • anonymous
x+7?
misty1212
  • misty1212
you know what i mean by that?
misty1212
  • misty1212
yeah you get \(x+7\)
anonymous
  • anonymous
thank you
misty1212
  • misty1212
\[\color\magenta\heartsuit\]
anonymous
  • anonymous
:)

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