Medium
Simplify: √(80) is equal to which surd form?
Explanation
Explanation
We look for the largest perfect square factor of 80. Since 80 = 4² × 5, we can pull 4² out of the square root as 4. That leaves √5 inside, so √80 = 4√5.
PRO TIP
Re-check your working by substituting the answer back into the original question.