How do you rationalize the denominator and simplify sqrt24/sqrt3?
1 Answer
May 13, 2016
Explanation:
We will use:
-
If
a, b >= 0 thensqrt(ab) = sqrt(a)sqrt(b) -
If
b > 0 thensqrt(a/b) = sqrt(a)/sqrt(b)
The normal way to solve this example is to multiply both the numerator and denominator by
sqrt(24)/sqrt(3) = (sqrt(24)*sqrt(3))/(sqrt(3)*sqrt(3)) = sqrt(72)/3 = sqrt(6^2*2)/3 = (sqrt(6^2)*sqrt(2))/3 = (6sqrt(2))/3 = 2sqrt(2)
Alternatively, we can combine the numerator and denominator inside the square root:
sqrt(24)/sqrt(3) = sqrt(24/3) = sqrt(8) = sqrt(2^2)*sqrt(2) = 2sqrt(2)