Question

(x elevado a 2 -3y)elevado 2​

Answer 1

(x²-3y)²

(x²-3y)(x²-3y)

x⁴-3xy-3xy+9y²

x⁴-6x²y+9y²

Answer 2

${( {x}^{2} - 3y) }^{2} \\ = ( {x}^{2} - 3y) \times ( {x}^{2} - 3y) \\ = {x}^{4} - 3 {x}^{2} y - 3 {x}^{2} y + 9y^{2} \\ {x}^{4 } - 6 {x}^{2} y + 9 {y}^{2}$

acho que seja isso