Question

simplify (4m+5n)^2+(5m+4n)^2+(4m+5n)(4m-5n)​

Answer 1

Answer:

Step-by-step explanation:

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Answer 2

Answer:

=(4m + 5n)^2+(5m+4n)^2+(4m+5n)(4m-5n)

Step-by-step explanation:

=( 4m)^2+2(4m)(5n) +(5n)^2+ (5m)^2+2(5m)(4n)+16m^2-25n^2

= 16m^2+40mn+25n^2+25m^2+40mn+16m^2-25n^2

=((16m^2+40mn+16m^2)^2