Odpowiedź :
[tex]a = |(-0,5) - 45:0,64-\sqrt{0,64}|=|-0,5 - 4500:64 - 0,8| = |-1,3 - 70,3125| =\\\\=|-71,6125| = -(-71,6125) = 71,6125\\\\\\b = 1,8\cdot13 - \sqrt{0,36}\cdot9 = 23,4 -06\cdot9 = 23,4 - 5,4 = 18\\\\\\\underline{a-b = 71,6125-18 = 53,6125}[/tex]