davepera73
davepera73 davepera73
  • 06-11-2020
  • Mathematics
contestada

(x+3) (x+5)
=x•x+x•5+3•x+3•5
=x²+5x+3x+15
=x²+8x+15
"Has it been done correctly"
​

Respuesta :

loreal33
loreal33 loreal33
  • 06-11-2020
Yes, it has been done correctly.

It used the FOIL method, which is first(x and x), outer (x and 5), inner (3 and x), and last (3 and 5). And then you add the like terms.
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