Express the radical expression in simplest form: sqrt(72) - sqrt(18) + sqrt(50).
Answer and explanation
Correct answer: B. 8*sqrt(2)
- Step 1: Simplify each radical: sqrt(72) = 6sqrt(2), sqrt(18) = 3sqrt(2), sqrt(50) = 5sqrt(2). Step 2. Combine coefficients: (6 - 3 + 5)sqrt(2) = 8sqrt(2). Answer: 8sqrt(2). Why not the others:* 6sqrt(2) or 7*sqrt(2) result from arithmetic errors in subtracting 3 and adding 5.
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