Question

Answer fast it's urgent​

Answer 1

Step-by-step explanation:

I hope this is helpful for you

Answer 2

Step-by-step explanation:

Use this formula,

$(x + a)(x + b) = {x}^{2} + (a + b)x + ab \\ \\ x = 2 {a}^{2} \\ a = 3 {b}^{2} \\ b = - 5 {b}^{2} \\ \\ (2 {a}^{2} + 3 {b}^{2} )(2 {a}^{2} - 5 {b}^{2} ) = (2 { {a}^{2} )}^{2} + (3 {b}^{2} + ( - 5 {b}^{2}) )2 {a}^{2} + 3 {b}^{2} ( - 5 {b}^{2} ) \\ = 4 {a}^{4} + 6 {a}^{2} {b}^{2} - 10 {a}^{2} {b}^{2} - 15 {b}^{4} \\ = 4 {a}^{4} - 4 {a}^{2} {b}^{2} - 15 {b}^{4}$