SOLUTION: How do i find the domain for f(x)=sqrt(x^(2))-6x+8

SOLUTION: How do i find the domain for f(x)=sqrt(x^(2))-6x+8

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Question 417010: How do i find the domain for f(x)=sqrt(x^(2))-6x+8
Answer by Gogonati(855) (Show Source): You can put this solution on YOUR website!
Square root is defined where the radical is positive 0r zero.
x^2-6x+8>=0; D=(-6)^2-4(1)(8)=36-32=4; x1/2=(6+-2)/2 {4,2} The domain is;
(-infinity,2]U[4,+infinity) or D={x real such that x<=2 and x>=4 }
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