pliss di jawab dong. (a²+2b²)² =

(a² + 2b²)²
= (a² + 2b²)(a² + 2b²)
= a⁴ + 2a²b² + 2a²b² + 2b⁴
= a⁴ + 4a²b² + 2b⁴

Maaf Kalau Salah

(a²+2b²)²
=(a²+2b²)(a²+2b²)
=(a²)(a²)+(a²)(2b²)+(2b²)(a²)+(2b²)(2b²)
=a⁴+2a²b²+2a²b²+4b⁴
=a⁴+4a²b²+4b⁴