Theloshua
  • Theloshua
(x + 2)(3x) = (x + 2)(6)
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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Vocaloid
  • Vocaloid
distribute on both sides
Theloshua
  • Theloshua
3x^2 + 6x = 6x + 12
Vocaloid
  • Vocaloid
good, now subtract 6x from each side

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More answers

Theloshua
  • Theloshua
3x^2 = 12
Vocaloid
  • Vocaloid
good, now divide both sides by 3
Theloshua
  • Theloshua
x = 2
Theloshua
  • Theloshua
right?
Vocaloid
  • Vocaloid
almost, don't forget x = -2 as well x = 2 and x = -2
Theloshua
  • Theloshua
wait, how?
Vocaloid
  • Vocaloid
when we solve x^2 = A, we must take into account the positive and negative square roots
Theloshua
  • Theloshua
but if its squared doesnt it turn positive?
Vocaloid
  • Vocaloid
right, that's precisely why we need to take both positive and negative roots
Theloshua
  • Theloshua
can you type it out so i can see?
Vocaloid
  • Vocaloid
allow me to explain
Vocaloid
  • Vocaloid
we got down to x^2 = 4, right?
Theloshua
  • Theloshua
right
Vocaloid
  • Vocaloid
you found x = 2, which works when we substitute back into the equation x^2 = 4 2^2 = 4
Vocaloid
  • Vocaloid
notice what happens when we let x = -2 instead x^2 = 4 (-2)^2 = 4 4 = 4 therefore, x = -2 is also a solution.
Theloshua
  • Theloshua
ohhhhh..... but is that how I figure it out in every situation, or is there a way so it becomes part of the routine of solving the problem?
Vocaloid
  • Vocaloid
in general: |dw:1443665411909:dw| this is a tricky concept
Theloshua
  • Theloshua
XD okay, okay, I get you *sticks out tongue at you*
Theloshua
  • Theloshua
Thaaaaanks!!!! :)

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