<p>I can't remember how to do this. Could someone explain step by step?</p>
<p>If (x+2)^2 = 9, what is the value of (x+1)(x+3)?</p>
<p>Also, a link to where these types of problems are explained would help. College Board calls them "multistep problems involving linear and quadratic relationships", but that doesn't yield any results. </p>
<p>No videos though please. I've found those already, but I'm in a library at the moment. :p</p>
<p>(Surely the answer is 8, square root (x+2)^2 and you get x+2 = 3, x = 1, plug it in…)</p>
<p>But, hmm, I never noticed this, but do SAT I math problems never require you to use +/- when taking the square root of both sides of an equation? Since (x+1)(x+3) could have two values here…</p>
<p>Bump.</p>
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<p>That’s a simple solution. Thank you. I don’t know why I get stumped on all of the ridiculously simple problems. I do much better and have much more fun with the tricky, long-winded word problems. :p</p>
<p>And I won’t be surprised when I receive the May SAT math report and see that all of my mistakes were made on the easy questions…</p>
<p>However, I’m currently going over the SAT skills insight on College Board’s website. So far I have discovered that I’ve forgotten a fair amount of fundamental rules. I’ll be reviewing everything there thoroughly, so I hope I’ll do much better in math next time.</p>
<p>And I highly recommend the skills insight tool to anyone looking to improve their score dramatically if you think you’re just lacking or have forgotten the basics like me. At the very least it well help you narrow down your weaknesses.</p>