kfortenberry
kfortenberry kfortenberry
  • 24-08-2016
  • Mathematics
contestada

Factor by grouping.
x2 + 8x + xy + 8y

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VonDaniels
VonDaniels VonDaniels
  • 24-08-2016
Don't you see that y is a stranger. So group it -y(x+8) 
The balance just happens to be x(x+8) 
So you have these two terms. Take the common factor out. 
(x+8) (x-y) now that's the answer. Easy ... 
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StressarN StressarN
  • 24-08-2016
= x(x + 8) - y(x + 8)
= (x - y)(x + 8)
Answer Link

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