Solve: Adding Square Roots of Fractions 49/4 and 9/36

Question

Solve the following exercise:

494+936= \sqrt{\frac{49}{4}}+\sqrt{\frac{9}{36}}=

Video Solution

Solution Steps

00:00 Solve the following problem
00:04 The root of a fraction (A divided by B)
00:08 Equals the root of the numerator(A) divided by the root of the denominator(B)
00:11 Apply this formula to our exercise
00:23 Factorize 49 to 7 squared
00:27 Factorize 4 to 2 squared
00:30 Factorize 9 to 3 squared
00:33 Factorize 36 to 6 squared
00:37 The root of any number (A) squared cancels out the square
00:44 Apply this formula to our exercise and proceed to cancel out the squares
01:02 Factorize 6 into factors 3 and 2
01:06 Simplify wherever possible
01:11 Combine with the common denominator
01:18 This is the solution

Step-by-Step Solution

To solve this problem, we'll proceed with the following steps:

  • Step 1: Simplify 494\sqrt{\frac{49}{4}}.
  • Step 2: Simplify 936\sqrt{\frac{9}{36}}.
  • Step 3: Add the results obtained from Step 1 and Step 2.

Step 1: We use the square root of a quotient property ab=ab\sqrt{\frac{a}{b}} = \frac{\sqrt{a}}{\sqrt{b}}. For 494\sqrt{\frac{49}{4}}:

494=494=72\sqrt{\frac{49}{4}} = \frac{\sqrt{49}}{\sqrt{4}} = \frac{7}{2}

Step 2: Similarly, apply the same property to 936\sqrt{\frac{9}{36}}:

936=936=36=12\sqrt{\frac{9}{36}} = \frac{\sqrt{9}}{\sqrt{36}} = \frac{3}{6} = \frac{1}{2}

Step 3: Add the two results obtained:

72+12=7+12=82=4\frac{7}{2} + \frac{1}{2} = \frac{7 + 1}{2} = \frac{8}{2} = 4

Therefore, the solution to the problem is 44.

Answer

4