Question

Which choice is equivalent to the expression below?

square root 20 - square root 5 + square root 45

Answer 1

4√(5)

Explanation:

√(20)-√(5)+√(45)

→ 2√(5)-√(5)+3√(5)

→ 4√(5)

Answer 2

• D. 4√5

Explanation:

• √20 - √5 + √45 =
• 2√5 - √5 + 3√5 =
• (2 - 1 + 3)√5 =
• 4√5

Correct choice is D