Question

9x²-4(y+2x)² find pls​

Answer 1

Step-by-step explanation:

$\huge\underline{\underline{\sf ANSWER}} \\ 9 {x}^{2} - 4 {(y + 2x)}^{2} \\ 9 {x}^{2} - 4( {y}^{2} + 4 {x}^{2} + 4xy) \\ 9 {x}^{2} - 4 {y}^{2} - 16 {x}^{2} - 16xy \\ - 5 {x}^{2} - 4 {y}^{2} - 16xy \\ 5 {x}^{2} + 4 {y}^{2} + 16xy$