Question

( 5a² - 3b ) ( 5a² + 6b )

Answer 1

Answer:

( 5a² - 3b ) ( 5a² + 6b )

$⟹{{5 {a}^{2} + ( -3 b)}(5 {a}^{2} + 6b)$

$⟹{(5 {a}^{2} )}^{2} + ( - 3b + 6b)5 {a}^{2} + ( - 3b).6b$

$⟹25 {a}^{4} + 3b.5 {a}^{2} - 18 {b}^{2}$

$⟹25 {a}^{4} + 15 {a}^{2} b - 18 {b}^{2}$