Question

Simplify.

Assume all variables are nonnegative.

Answer 1

Correct answer: Third statement 4b√a

Explanation:

Given:

√ab² + 3√9ab² - 3√4ab² = √b²· √a + 3 √9 · √b²· √a - 3 · √4 · √b²· √a =

= b√a + 3 · 3 · b · √a - 3 · 2 · b · √a = b√a + 9b√a - 6b√a = 10b√a - 6b√a =

= 4b√a

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