Question

 ПОМОГИТЕ ПЖ!!!  выполните умножение:(5n^4-m^4)(5n^4+m^4)=

Answer 1

(5n*4-m*4)(5n*4+m*4)=5n*4-m*4*5n*4+m*4= 5^{2}* n^{2}* 4^{2}-m* 4^{2}+m=10* n^{2}* 8^{2}-m+m=6,4 n^{2}-m+m

Answer 2

n^{2}= n^{2}