Question

find the coefficient of x⁴ in the expansion of (1+x²)² (2+x²)⁵​

Answer 1

Answer:

Using formula (a+b) ^2 = a^2+b^2 + 2ab

1+x^4+2x^2 (4 +x^7+4x^2 )

The coefficient of x^4 is 1

answer is 1

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