Question 107718
1. Find the domain: square root of 10-2x
10-2x >= 0
2x<=10
x<=5
Domain: all Real numbers less than or equal to five
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2. Simplify without radicals square root of (25x^2 + 16)^2 
25x^2+16
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3. Write as a radical expression A^2/5 
sqrt(A^4/25)
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4. Rewrite under one radical square root of x times square root of (x^4)^5 
= sqrt(x*x^20)
= sqrt(x^21)
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Cheers,
Stan H.