3972×(3962-147)-3962×(3972-147)
= 3972 x 3962 - 147 - 3962 x 3972 - 147
= 147 x [(3972-3972)-(3962-3962)]
= 147 x [ 0 - 0 ]
= 147 x 0
= 0
#Hok_tốt
3972 x (3962 - 147) - 3962 x (3962 - 147)
= 3962 x 3962 - 3962 x 147 - 3962 x 3962 - 3962 - 147
= (3962 x 3962 - 3962 x 3962 ) - (3962 x 147 - 3962 x 147)
= 0 - 0
= 0.