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Anyone here real good at Algebra 2 (composition of functions)??
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<blockquote data-quote="Kathy813" data-source="post: 548891" data-attributes="member: 1967"><p>g(f(a)) means that you first substitute the <em>a</em> into the f function to get 3<em>a</em> - 5. Then you substitute the 3<em>a</em> - 5 into the g function:</p><p></p><p>x^2 + 2</p><p>(3a - 5)^2 +2</p><p>(3a - 5)(3a - 5) + 2</p><p>9a^2 -15a -15a +25 +2</p><p>9a^2 -30a + 27</p><p></p><p>So g(f(a)) = 9a^2-30a + 27</p><p></p><p>Here is a great video that might help: </p><p><a href="http://patrickjmt.com/composition-of-functions/" target="_blank">http://patrickjmt.com/composition-of-functions/</a></p><p></p><p><a href="http://www.patrickjmt.com" target="_blank">www.patrickjmt.com</a> is an awesome site that has videos to help with anything you could want to know about algebra.</p></blockquote><p></p>
[QUOTE="Kathy813, post: 548891, member: 1967"] g(f(a)) means that you first substitute the [I]a[/I] into the f function to get 3[I]a[/I] - 5. Then you substitute the 3[I]a[/I] - 5 into the g function: x^2 + 2 (3a - 5)^2 +2 (3a - 5)(3a - 5) + 2 9a^2 -15a -15a +25 +2 9a^2 -30a + 27 So g(f(a)) = 9a^2-30a + 27 Here is a great video that might help: [URL="http://patrickjmt.com/composition-of-functions/"]http://patrickjmt.com/composition-of-functions/[/URL] [url]www.patrickjmt.com[/url] is an awesome site that has videos to help with anything you could want to know about algebra. [/QUOTE]
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Anyone here real good at Algebra 2 (composition of functions)??
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