need fast solution........
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Step-by-step explanation:
Using identity (a+b)²=a²+b²+2ab
(2m²+2n²)²=(2m²)²+(2n²)²+2(2m²×2n²)
=4m⁴+4n⁴+8(mn)²
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(2m²+3n²)²
=(2m²)²+(3n²)²+2×2m²×3n²
=4m⁴+9n⁴+12m²n². (Ans)
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