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anonymous
 one year ago
need help !! :))
anonymous
 one year ago
need help !! :))

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phi
 one year ago
Best ResponseYou've already chosen the best response.3line 1 is ok. but line 2 is wrong in other words, (xy)^2 is *not* x^2y^2 (which is what they did) (xy)^2 is x^2 +y^2 2xy

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0what am i supposed to d then? how do i solve it

phi
 one year ago
Best ResponseYou've already chosen the best response.3You did not post the question. I assume they want to know which line contains a mistake. If so, that would be line 2.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0i have to find the mistake then solve it correctly

phi
 one year ago
Best ResponseYou've already chosen the best response.3ok. line 1 is technically not a mistake, but it is the wrong first step (line 2 is definitely a mistake) I would start over, with the original \[ x  \sqrt{174x}= 3 \] and put the square root on the righthand side , like this: \[ x  \sqrt{174x} +\sqrt{174x} = 3 + \sqrt{174x} \] the left side simplifies \[ x= 3 + \sqrt{174x} \] now add 3 to both sides \[ x3 = \sqrt{174x} \]

phi
 one year ago
Best ResponseYou've already chosen the best response.3now square both sides. on the left that means write (x3)^2 on the right , what do you get after squaring ? any idea?

phi
 one year ago
Best ResponseYou've already chosen the best response.3yes, that is the left side. the right side is "easy"  squaring gets rid of the square root side. can you write down the whole equation (both sides)?

phi
 one year ago
Best ResponseYou've already chosen the best response.3now add 17 to both sides and +4x to both sides

phi
 one year ago
Best ResponseYou've already chosen the best response.3you mean X^22X8=0 remember it is an equation

phi
 one year ago
Best ResponseYou've already chosen the best response.3yes. you can use the quadratic formula (if they want you to) but you can factor this: notice 4* 2= 8 and 4+2= 2

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0THATS IT? thanks so much!! :)

phi
 one year ago
Best ResponseYou've already chosen the best response.3(x4)(x+2)= 0 either x4=0 > x=4 or x+2 =0 > x= 2 however, with these types of problems you have to check both solutions. sometimes you get an "extraneous" solution. So check both values in the original equation

anonymous
 one year ago
Best ResponseYou've already chosen the best response.02 is false. thanks:)
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