shannonhausmann
shannonhausmann
28-01-2015
Mathematics
contestada
Algebra 2
Solve: f(x)=x^2-9
Respuesta :
blackwelldavid
blackwelldavid
28-01-2015
This problem is a difference of squares. So to solve this you want to factor it out so you get two numbers that multiple to -9 and add to 0. That would be -3 and 3
f(x)=(x-3)(x+3)
So your solution when you set f(x) to 0 would be -3 and 3.
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