ahmedhraf30 ahmedhraf30
  • 17-09-2019
  • Mathematics
contestada

factorise (x+y)^2-(4-x)^2​

Respuesta :

Kavisek2005 Kavisek2005
  • 17-09-2019

Answer:

by using the identity a square - b square = (a+b)*(a-b)

a = x+y

b=4-x

= (x+y + 4-x)(x+y - 4-x)

y+4 * x+y -4+x

y+4*2x+y-4

2xy+y square -4y + yx + 4x + 4y - 16 +4x

3xy +y square + 8x -16

Step-by-step explanation:

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