Question

решите, пожалуйста
875 (2,4,6)

Answer 1

2)
$25-(a+7)^2=5^2-(a+7)^2=(5-(a+7))*(5+(a+7))=\=(-a-2)(a+12)$


4)
$(5x-3y)^2-16x^2=(5x-3y)^2-(4x)^2=\=(5x-3y-4x)(5x-3y+4x)=(x-3y)(9x-3y)$


6)
$49m^2-(n+8m)^2=(7m)^2-(n+8m)^2=\=(7m-(n+8m))(7m+(n+8m))=(-m-n)(15m+n)$