Question

(2a² – b) (за² + 3b)

Answer 1

a^4+3a^2-3b^2

Explanation:

`\hookrightarrow \: (2 {a}^(2) - b)(3 {a}^(2) + 3b) \\ \hookrightarrow \:2 {a}^(2) (3 {a}^(2) + 3b) - b(3 {a}^(2) + 3b) \\ \hookrightarrow \:6 {a}^(4) + 6 {a}^(2) b - 3 {a}^(2) b - 3 {b}^(2) \\ \hookrightarrow \:{a}^(4) + 3 {a}^(2) b- 3 {b}^(2)`