Odpowiedzi

2010-01-20T20:59:28+01:00
-0,3² - 2×(-0,7)²×(-0,3) = -0,09-2*0,47*(-0,3) = -0.09-0,94*(-0,3) = -0,09+0,282 = 0,192

(2½)²-2 × 1¼² + 2½×1¼ =(5/2)²-2*(5/4)²+5/2*5/4 = 25/4-2*25/16+25/8 = 25/4-25/8+25/8=25/4=6 1/4