Question

subtract.: 5mn - 3mn + n². From 7m² + mn - 4n²​

Answer 1

Answer:

May be the answer of this question is 7 m*2 + 3mn - 3n*2.

Hope it's helpful to you.

According to my point of view this is the correct answer.

Answer 2

${\mathcal{\purple{Q}\green{U}\pink{E}\blue{S}\purple{T}\green{I}\pink{O}\red{N}\blue{:-}}}$

subtract 5mn-3m²+n² from 7m²+mn-4n²

${\mathcal{\purple{A}\green{N}\pink{S}\blue{W}\purple{E}\green{R}\pink{!}}}$

10m²-4mn-5n²

$\displaystyle\huge\red{\underline{\underline{Solution}}}$

$\displaystyle\huge\pink{\underline{\underline{1st Method}}}$

5mn-3m²+n² from 7m²+mn-4n²

7m²+mn-4n²-(5mn-3m²+n²)

7m²+mn-4n²-5mn+3m²-n²

7m²+3m²+mn-5mn-4n²-n²

10m²-4mn-5n²

$\displaystyle\huge\pink{\underline{\underline{2nd Method}}}$

2nd Method....-

5mn-3m²+n²

+mn+7m²-4n²

-⠀⠀ -⠀⠀⠀+⠀

4mn-10m²+5n²

$\huge{\boxed{hope\:it\:help\:you}}$