anonymous
  • anonymous
Medal & fan. Determine the solution set of (x + 2)^2 = 36. Would i use foil here?
Mathematics
jamiebookeater
  • jamiebookeater
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freckles
  • freckles
Take square root of both sides.
freckles
  • freckles
you will wind up with two equations to solve x+2=6 or x+2=-6
anonymous
  • anonymous
x=4 or x=-4?

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hybrik
  • hybrik
Yes, x = + or - 4 [Also known as -4,4]
anonymous
  • anonymous
answer choices are: a.) (6,-8) b.) (4,-8) c.) (4,-6)
hybrik
  • hybrik
What is the square root of 36?
anonymous
  • anonymous
\[\pm6\]
anonymous
  • anonymous
in this case negative
hybrik
  • hybrik
So find what x+2 = 6 and x-2 = 6, solve and you get, x=4, and x=8
anonymous
  • anonymous
its for sure positive 8?
hybrik
  • hybrik
4,-8
anonymous
  • anonymous
oh okay
freckles
  • freckles
\[x+2=6 \text{ or } x+2=-6 \\ \text{ subtracting 2 on both sides gives } \\ x=6-2 \text{ or } x=-6-2 \\ x=4 \text{ or } x=-8\]
freckles
  • freckles
not 8
freckles
  • freckles
pluggin in 8 yields (8+2)^2=36 which is not a true equation
freckles
  • freckles
(4+2)^2=36 is true (-8+2)^2=36 is also true @yungjvke

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