Question

doy CORONITA ayudaaaaaaaaa​

Answer 1

Respuesta:

a) $(3xy-1) .(9x^{2} y^{2} +3xy+1)$
b) $(5a^{2} b-4c).(25a^{4} b^{2} +20a^{2} bc+16c^{2} )$
c)$8(3r^{3} +st).(9r^{6} -3r^{3} st+s^{2} t^{2} )$
d) $\frac{1}{250047} . (9m-14n).(81m^{2}+ 126mn+196n^{2} )$