Login

7(3x-4y)²-28(2x-y)²

7 {(3 x - 4 y)}^{2} - 28 {(2 x - y)}^{2} = 7 [{(3 x - 4 y)}^{2} - 4 {(2 x - y)}^{2}] = 7 [{(3 x - 4 y)}^{2} - {\{2 (2 x - y)\}}^{2}] = 7 [\{(3 x - 4 y) + 2 (2 x - y)\} \{(3 x - 4 y) - 2 (2 x - y)\}] [as, a^{2} - b^{2} = (a + b) (a - b)] = 7 [(3 x - 4 y + 4 x - 2 y) (3 x - 4 y - 4 x + 2 y)] = 7 (7 x - 6 y) (- x - 2 y) = - 7 (7 x - 6 y) (x + 2 y)

3

View Full Answer

Copyright © 2024 Aakash EduTech Pvt. Ltd. All rights reserved.

Aakash EduTech Pvt. Ltd.

What are you looking for?