Question

478(4) плиз решите срочно!!!

Answer 1

(ad+cbe)²+c(ae-bd)²=a²d²+2adcbe+c²b²e²+c(a²e² -2aebd+b²d²)=

=a²d²+2adcbe+c²b²e²+a²e²c-2aebdc+b²d²c=

=a²d²+c²b²e²+a²e²c+b²d²c=

=(a²d²+a²e²c)+(c²b²e²+b²d²c)=a²(d²+e²c)+b²c(ce²+d²)=

=(d²+ce²)(a²+b²c)=(a²+cb²)(d²+ce²)