The Official PSAT For Saturday October 21, 2006

<p>the answer was x^2=y^2</p>

<p>chinnu, this is CC.com, you know most people that took the psat are probably doing things they enjoy now, instead people on this website are eager to know what they got. I think the people on this site are among the top 20%</p>

<p>why is that the answer?</p>

<p>(X + Y) ( X^2 - Y^2)</p>

<p>X = -Y</p>

<p>((-Y) + Y) ((-Y)^2 - Y^2) = 0</p>

<p>because if x^2 = y^2, then one of the brackets would equal 0, thus the equation = 0</p>

<p>b/c x^2=y^2 must be true whereas x=-y is true only in certain cases</p>

<p>this was similar in principle to a problem in the practice PSAT they handed out</p>

<p>whenever you have two factors with variables = 0, you have to be careful to note that only one HAS to be zero.</p>

<p>in this case, x=y would imply that the second factor HAD to be zero, x=-y implies that the first factor HAD to be zero. x^2=y^2 gives possibilities such that only one of the two factors could equal zero, so it MUST BE true.</p>

<p>the other two choices took only a few seconds to realize that the were incorrect</p>

<p>lol gayed.</p>

<p>whoa i didnt even think that deep</p>

<p>for the writing section in the improving sentence. what was the answer to question about the british gov. putting forth some laws to protect child labor impacting child labor. i remember my answer starting with but</p>

<p>so what was the answer to the water fluid problem?</p>

<p>EDIT: it only impacted textiles</p>

<p>Oh i remember,
and yeah i think i put it only impact textiles instead of the impacting one</p>

<p>water fluid was 30</p>

<p>water problem: 30</p>

<p>darn >.< I put 48</p>

<p>yeah i think it was ", but it only impacted textiles" (?)</p>

<p>was your choice like this "but it only impacted textile" or something along those lines</p>

<p>i dont think that was a choice</p>

<p>in writing sec. the wimbledon question was it problem with illogical comparisons</p>

<p>i don't remember that many writing problems....just remember it was fairly easy. 3-4 wrong maybe</p>

<p>edit: if the wimbledon was the last finding errors, then ye, it was illogical comparison.</p>