Math, asked by aaarohi, 1 year ago

Factorise : 9 (x+y)²- 16 (x - 3y)²​ pls answer i will mark as brainlist ​

Answers

Answered by bhawani28
21

Answer:

sol. 9(x+y)^ - 16 (x-3y)^=0

9 (x^ +2xy +y^) - 16 (x^-6xy+9y^)=0

9x^ +18xy +9y^- 16x^ + 96xy - 144y^=0

9x^-16x^+9y^-144y^+18xy+ 96xy

-7x^ - 135y^ + 114xy = ans..

Answered by Souviksvk10
41

Answer:

Here's the solution

Step-by-step explanation:

9 {(x + y)}^{2}  - 16 {(x - 3y)}^{2}  \\  =  {3}^{2}  {(x + y)}^{2}  -  {4}^{2}  {(x - 3y)}^{2}  \\  =  {(3x + 3y)}^{2} -  {(4x - 12y)}^{2}   \\  = (3x + 3y + 4x - 12y)(3x + 3y - 4x + 12y) \\  = (7x - 9y)(15y - x)

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