kamdyn2
kamdyn2
27-04-2017
Mathematics
contestada
How do I do this I don't know how to do it
Respuesta :
choco4
choco4
27-04-2017
x^2 - 4 = (x-2) (x + 2)
x^2 -4x + 4= (x - 2) (x -2)
2 numbers that multiply to 4
those 2 numbers have to add up to -4
-2 x -2 = 4
-2 + -2 = -4
now to divide (x -2 )(x +2 )
( x-2 ) (x - 2)
x -2 cancels
the answer is x+2 divide by x-2
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