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Usando Kits da Experimentoteca de Matemtica para ... - CDCC - USP

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2<br />

2<br />

E teremos ( − 3 + 4) − ( 2x<br />

+ 3x<br />

− 5) = −2x<br />

− 6x<br />

+ 9<br />

x :<br />

Po<strong>de</strong>mos também mo<strong>de</strong>lar as várias possibili<strong>da</strong><strong>de</strong>s <strong>para</strong> o produto, usando as<br />

representações:<br />

1× x = x<br />

x × x =<br />

2<br />

x<br />

2<br />

2<br />

( − x) × 3x<br />

= −3x<br />

( − 2x ) × ( − 3x) = 6x<br />

26

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