iwanttogotostanford
  • iwanttogotostanford
ACT PREP Q NEED HELP:
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
its A
iwanttogotostanford
  • iwanttogotostanford
@123666 how do I explain that???
Utterly_Confuzzled
  • Utterly_Confuzzled
I got B I plugged in 2 numbers that would work A=2 and b=1 and plugged in to see which have the highest answer

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anonymous
  • anonymous
try multiplying them all out
iwanttogotostanford
  • iwanttogotostanford
I need to explain it and all of its steps and I'm not sure how to do that
iwanttogotostanford
  • iwanttogotostanford
@peachpi @Utterly_Confuzzled
anonymous
  • anonymous
multiply the first two out
iwanttogotostanford
  • iwanttogotostanford
ok
iwanttogotostanford
  • iwanttogotostanford
and then what?
Utterly_Confuzzled
  • Utterly_Confuzzled
Work 2(1+2) = 6 (1+2)^2 = 9 2^2 + 1^2 = 5 2^2 - 1^2 = 3
anonymous
  • anonymous
then compare them. what did you get?
anonymous
  • anonymous
*when you multiplied
iwanttogotostanford
  • iwanttogotostanford
they are the same except one is multiplying by 2 and the other is multiplying by ^2
Utterly_Confuzzled
  • Utterly_Confuzzled
Would something like "I found 2 numbers that worked with the criteria I was given and plugged them into each answer choice to see which one gave me the largest answer" work?? Or does it have to be step by step?
anonymous
  • anonymous
they are not the same. the first one is multiplied by 2. Distribute the 2. The second is raised to the power of 2. \((a + b)² = (a + b)(a + b)\). You can FOIL that
iwanttogotostanford
  • iwanttogotostanford
Step by step Im pretty sure
Utterly_Confuzzled
  • Utterly_Confuzzled
One is multiplying by 2 and the other is squaring the answer. It makes a big difference
iwanttogotostanford
  • iwanttogotostanford
yep! I see now how you got that.
iwanttogotostanford
  • iwanttogotostanford
i didn't mean they ARE the same i meant they LOOK the same exceptt for that
anonymous
  • anonymous
tbh @Utterly_Confuzzled strategy is what you would want to use on the actual ACT
iwanttogotostanford
  • iwanttogotostanford
yeah, true. ok! So thats basically how I would solve the problem???
iwanttogotostanford
  • iwanttogotostanford
what @Utterly_Confuzzled said ? And it is B?
anonymous
  • anonymous
yeah. Is plugging in numbers what you're looking for in the way of an explanation.
Utterly_Confuzzled
  • Utterly_Confuzzled
Yes it's B And I think they meant finding two numbers that work and just plugging them in
iwanttogotostanford
  • iwanttogotostanford
Okay! Thanks to both of you
anonymous
  • anonymous
the only thing I'd suggest with plugging in numbers is to not use 1 or 0. In this case it works out, but they can be wonky depending on the scenario
iwanttogotostanford
  • iwanttogotostanford
okay, but what utterly said should be sufficient?? In explaining my answer?
anonymous
  • anonymous
I guess.
Utterly_Confuzzled
  • Utterly_Confuzzled
@peachpi is right, it's normally safest not to use 0 or 1 And I believe it should suffice.
iwanttogotostanford
  • iwanttogotostanford
Its for a grade but its ACT prep...
anonymous
  • anonymous
are you looking for an algebraic explanation, or a "this is how I would solve the problem" explanation
iwanttogotostanford
  • iwanttogotostanford
@peachpi this is how Id solve the problem
anonymous
  • anonymous
yeah just plug in numbers
iwanttogotostanford
  • iwanttogotostanford
sounds good?
anonymous
  • anonymous
yes
iwanttogotostanford
  • iwanttogotostanford
ok- thanks again for your help:-)
anonymous
  • anonymous
well you want to say you plugged them into all four options and B was the highest
iwanttogotostanford
  • iwanttogotostanford
okay. Thanks, that helped!
anonymous
  • anonymous
np

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