Question

simplify ( m +n) ( 2m + n) + (m – n) ( 2m+n)

Answer 1

Step-by-step explanation:

m+n)(2m+n)+(m+2n)(m−n)

=2m

2

+mn+2mn+n

2

+(m

2

−mn+2mn−2n

2

)

=2m

2

+mn+2mn+n

2

+m

2

−mn+2mn−2n

2

=3m

2

+2mn−n

2

Answer 2

༒࿐៚ Answer ༒࿐៚

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