Question

resolva a expressão

Answer 1

(0,5-m)(0,5+m)-(0,5-m)²
=0,5²-m²-(0,5²-2*0,5m+m²)
=0,25-m²-0,25+m-m²
=-2m²+m-0,25+0,25
=-2m²+m

espero ter ajudado

Answer 2

$( \frac{1}{2} - m).( \frac{1}{2} + m) - ( \frac{1}{2} - m)^{2} \\ \\ ( \frac{1}{2} - m) \times ( \frac{1}{2} + m - ( \frac{1}{2} - m)) \\ \\ ( \frac{1}{2} - m) \times ( \frac{1}{2} + m - \frac{1}{2} + m) \\ \\ ( \frac{1}{2} + m) \times 2m \\ \\ 2m \times ( \frac{1}{2} - m)$