Question

If the length of a rectangle having perimeter (6m2 - 2 mn + 2 m2n - 4n2) units, is
(3m2 + m2n -2 mn) units, then its breadth is equal to _______
units.
​

Answer 1

Explanation:

use perimeter of rectangle =2(l+b)

6m²-2mn+2m²n-4n²)=2(3m²+m²n-2mn)+b

6m²-2mn+2m²n-4n²-6m²-2m²n+2mn+2b=0

-4n²+2b=0

2b=4n²

b=4n²/2

put the value of n u get urs answer perfectly