Question

descompuneti in factori primi expresia:
${x}^{3} + 3 {x}^{2} - 4x - 12$
va rog mult de tot!!

Answer 1

x³+ 3 x² - 4 x - 12 = ( x + 3 ) ( x + 2 ) ( x - 2)

= x² ( x + 3 ) - 4 ( x + 3 ) =

=  ( x + 3 ) ( x² - 4 ) =

= ( x + 3 ) ( x + 2 ) ( x - 2 )