Question

(a+b): c = 0 (a-b): c= 0 (a·b): c = a (....................) = b. (.…......……..…....…….…...); a: (b. c) = (.................): C = (.....): b. • a​

Answer 1

Explicație pas cu pas:

$(a + b): c = 0 => a + b = 0 => a = -b$

$(a - b): c = 0 => a - b = 0 => a = b$

$(a \cdot b): c = a\cdot (b : c) = b\cdot (a : c)$

$a : (b\cdot c) = (a : b) : c = (1 : c) : b\cdot a$