priscyadutwumwaa priscyadutwumwaa
  • 01-10-2018
  • Mathematics
contestada

9 (x-y)^2-9 (x+y)(x-y)

Respuesta :

saadhussain514
saadhussain514 saadhussain514
  • 02-10-2018

Answer

This answer is 18y • (y - 1)

Explanation

Step by step solution:

Equation at the end of step 1:

[tex]9 (x - y) ^2 - 9 (x^{2} - y^{2})[/tex]

Equation at the end of step 2:

[tex]9 (x^2 + y^2 - 2xy) - 9 (x^2 - y^2)[/tex]

Equation at the end of step 3:

[tex]9x^2 + 9y^2 - 18xy - 9x^2 + 9y^2[/tex]

Equation at the end of step 4:

After performing basic +, - operation we get:

[tex]18y^2 - 18xy[/tex]

Answer is: 18y. (y – x)


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