Question

Nas expressões substitua as letras pelos valores correspondentes e em seguida resolva a operação. a) p2 - 3p, para p = -1/2

Answer 1

Oie, Td Bom?!

$= p {}^{2} - 3p ⇐p = - \frac{1}{2}$

$= ( - \frac{1}{2} ) {}^{2} - 3 \: . \: ( - \frac{1}{2} )$

$= ( \frac{1}{2} ) {}^{2} - 3 \: . \: ( - \frac{1}{2} )$

$= \frac{1 {}^{2} }{2 {}^{2} } - 3 \: . \: ( - \frac{1}{2} )$

$= \frac{1}{4} - 3 \: . \: ( - \frac{1}{2} )$

$= \frac{1}{4} + 3 \: . \: \frac{1}{2}$

$= \frac{1}{4} + \frac{3}{2} ⇐MMC \: (2 \: . \:2 = 4)$

$= \frac{1 + 6}{4}$

$= \frac{7}{4}$

Att. Makaveli1996