anonymous
  • anonymous
7x - 3x(x + 1)
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
7x-3x=4x(x+1)
♪Chibiterasu
  • ♪Chibiterasu
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anonymous
  • anonymous
That's what I got, but that's not one of the answer choices.

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♪Chibiterasu
  • ♪Chibiterasu
Also, your answer is not correct.
♪Chibiterasu
  • ♪Chibiterasu
You have to distribute into the parenthesis first.
♪Chibiterasu
  • ♪Chibiterasu
|dw:1449596862155:dw| multiply
anonymous
  • anonymous
3x times x is 3x
anonymous
  • anonymous
and 3x times 1 is 3x
♪Chibiterasu
  • ♪Chibiterasu
Nope. 3x * x look at it this way x * x = x^2
♪Chibiterasu
  • ♪Chibiterasu
When you multiply something by itself you're squaring it. We don't know the value of x so 3x * x becomes 3x^2
anonymous
  • anonymous
so 4x-3x^2
♪Chibiterasu
  • ♪Chibiterasu
Yes! Is that in your options?
anonymous
  • anonymous
Yes, it is
anonymous
  • anonymous
So whenever theres an x*x, it's squared?
♪Chibiterasu
  • ♪Chibiterasu
Yep.
♪Chibiterasu
  • ♪Chibiterasu
And the exponent grows for example: x^2 * x = x^3 x^3 * x = x^4
anonymous
  • anonymous
So x is x^1?

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