Question

Cat face a x b +c - b x[(a + b x c) - (a + c)] :5
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Answer 1

Răspuns:

=

$ab + c \: - b(a + bc) - b(a + c) = 5$

$ab + c - ab - {b}^{2} c - ab - bc = 5$

Se taie ab cu - ab

$c - {b}^{2}c - ab - bc = 5$

Dam factor comun

$c( {b}^{2} - 1) - b(a + c) = 5$