Question

Please answer this question of multiplication ​

Answer 1

(4/5 x² + y)²

$(a + b) {}^{2} = a {}^{2} + 2ab + b {}^{2}$

(4/5 x²)²+ 2×4/5 x×y ×y²

16/25 x⁴ + 8/5 xy + y²