ACT PREP Q NEED HELP:

- iwanttogotostanford

ACT PREP Q NEED HELP:

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- anonymous

its A

- iwanttogotostanford

@123666 how do I explain that???

- 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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## More answers

- anonymous

try multiplying them all out

- iwanttogotostanford

I need to explain it and all of its steps and I'm not sure how to do that

- iwanttogotostanford

@peachpi @Utterly_Confuzzled

- anonymous

multiply the first two out

- iwanttogotostanford

ok

- iwanttogotostanford

and then what?

- Utterly_Confuzzled

Work
2(1+2) = 6
(1+2)^2 = 9
2^2 + 1^2 = 5
2^2 - 1^2 = 3

- anonymous

then compare them. what did you get?

- anonymous

*when you multiplied

- iwanttogotostanford

they are the same except one is multiplying by 2 and the other is multiplying by ^2

- 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

they are not the same.
the first one is multiplied by 2. Distribute the 2.
The second is raised to the power of 2. \((a + b)Â² = (a + b)(a + b)\). You can FOIL that

- iwanttogotostanford

Step by step Im pretty sure

- Utterly_Confuzzled

One is multiplying by 2 and the other is squaring the answer. It makes a big difference

- iwanttogotostanford

yep! I see now how you got that.

- iwanttogotostanford

i didn't mean they ARE the same i meant they LOOK the same exceptt for that

- anonymous

tbh @Utterly_Confuzzled strategy is what you would want to use on the actual ACT

- iwanttogotostanford

yeah, true. ok! So thats basically how I would solve the problem???

- iwanttogotostanford

what @Utterly_Confuzzled said ? And it is B?

- anonymous

yeah. Is plugging in numbers what you're looking for in the way of an explanation.

- Utterly_Confuzzled

Yes it's B
And I think they meant finding two numbers that work and just plugging them in

- iwanttogotostanford

Okay! Thanks to both of you

- 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

okay, but what utterly said should be sufficient?? In explaining my answer?

- anonymous

I guess.

- Utterly_Confuzzled

@peachpi is right, it's normally safest not to use 0 or 1
And I believe it should suffice.

- iwanttogotostanford

Its for a grade but its ACT prep...

- anonymous

are you looking for an algebraic explanation, or a "this is how I would solve the problem" explanation

- iwanttogotostanford

@peachpi this is how Id solve the problem

- anonymous

yeah just plug in numbers

- iwanttogotostanford

sounds good?

- anonymous

yes

- iwanttogotostanford

ok- thanks again for your help:-)

- anonymous

well you want to say you plugged them into all four options and B was the highest

- iwanttogotostanford

okay. Thanks, that helped!

- anonymous

np

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