Math, asked by muhammadhammad1234, 6 months ago

(21m+12mn)²
1008 m²n = (21m-12 mn)²

Answers

Answered by laxmikumari16050

0

Answer:

1008m²n= _327m²n =1335m²n

Answered by raorangarao60

1

Answer:

Let a =21 mn b=12 mn

Now (a+b)^2-4ab= a^2+b^2+2ab -4ab

a^2+ b^2 -2ab = (a-b)^2

21*12*4=1008

Step-by-step explanation:

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