Question

6mn+5n²-2n from 3n²+4m-15mn​

Answer 1

$\large\fbox\red{Answer}$

$\sf\:Subtracting\:6mn+5n²-2n \:from \:3n²+4m-15mn$

$\sf\:➪3n²+4m-15mn- (6mn+5n²-2n )\:$

$\sf\:➪3n²+4m-15mn- 6mn-5n^{2}+2n\:$

$\sf\:➪3n²-5n²+4m+2n-15mn-6mn\:$

$\sf\:➪-2n²+4m+2n-21mn\:$

Thnku ❣