Question

Если n^2-m^2=25 найдите n+2m

Answer 1

n²-m²=25

(n-m)(n+m)=25 | : (n-m)

n+m = 25/(n-m) |+m

$n+m+m = \frac{25}{n-m} + m$

$n+2m = \frac{25+m*(n-m)}{n-m}$

$n+2m = \frac{25+mn-m^{2} }{n-m}$