SOLUTION: what is the domain:
squareroot of 5-x /X^2+8X-9
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Question 394779: what is the domain:
squareroot of 5-x /X^2+8X-9
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
what is the domain:
squareroot of 5-x /X^2+8X-9
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The denominator cannot be zero and
5-x cannot be negative.
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Solve 5-x >= 0
x <=5
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x^2+8x-9 = 0
(x+9)(x-1) = 0
x = -9 or x = 1
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On a number line graph x = -9, x=1 and the answer to x<=5
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So, x must be <=5 but not equal to 1 or -9
======================
Domain (-ing,-9)U(-9,1)U(1,5)
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Cheers,
Stan H.
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