Question

produtos notaveis
(2x³-5)²

Answer 1

$(a-b)^2=a^2-2ab+b^2$

Portanto,

$(2x^3-5)^2=\\(2x^3)^2-2.2x^3.5+5^2=\\2^2x^6-20x^3+25=\\4x^6-20x^3+25$

Answer 2

(2x³ - 5)²

(2x³ - 5)(2x³ - 5)

4x^6 - 10x³ - 10x³ + 25

4x^6 - 20x³ + 25