need fast and fast solution.......
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Answer:
4m⁴+9n⁴+12m²n²
Step-by-step explanation:
we can use formula (a+b)²
(2m²+3n²)²
=(2m²)²+(3n²)²+2.2m².3n²
4m⁴+9n⁴+12m²n²
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