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	<title>Comentários sobre: Álgebra &#8230; PRODUTOS NOTÁVEIS</title>
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		<title>Por: Eng. Luiz</title>
		<link>http://www.professoronline.net/algebra-produtos-notaveis/comment-page-1/#comment-680</link>
		<dc:creator><![CDATA[Eng. Luiz]]></dc:creator>
		<pubDate>Fri, 14 Dec 2012 22:55:44 +0000</pubDate>
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		<description><![CDATA[a) (x+6).(x-6) = 748 m²
x²-6x+6x-36=748 
x²-36=748
x² =748+36 = 784
x = raiz quadrada de 784 = 28 m
Comprimento: 28+6 = 34 m
Largura: 28-6 = 22 m
Área: 34 . 22 = 748 m²
b) Perímetro = 22+22+34+34 = 112 m
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		<content:encoded><![CDATA[<p>a) (x+6).(x-6) = 748 m²<br />
x²-6x+6x-36=748<br />
x²-36=748<br />
x² =748+36 = 784<br />
x = raiz quadrada de 784 = 28 m<br />
Comprimento: 28+6 = 34 m<br />
Largura: 28-6 = 22 m<br />
Área: 34 . 22 = 748 m²<br />
b) Perímetro = 22+22+34+34 = 112 m</p>
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