Question

(ii) (2x - 3y) (2x + 3y) (4x2 +9y2)​

Answer 1

Answer:

(2x−3y)(2x+3y)(4x2+9y2)

=((2x−3y)(2x+3y))(4x2+9y2)

=((2x−3y)(2x+3y))(4x2)+((2x−3y)(2x+3y))(9y2)

=16x4−36x2y2+36x2y2−81y4

=16x4−81y4

Answer 2

Step-by-step explanation:

2x – 3y)(2x + 3y) (4x2 + 9y2) Identity (a + b)(a-b) = a2 -b2 = [(2x)2 – (3y)2](4x2+ 9y2) = (4x2 – 9y2)(4x2 + 9y2) = (4x2)2 – (9y2)2 = 16x4 – 81y4