Solve the Equation: Square Root of 90 Divided by Square Root of x Equals 3

Question

Solve the following equation:

90x=3 \frac{\sqrt{90}}{\sqrt{x}}=3

Video Solution

Solution Steps

00:00 Find the value X
00:04 The root of the number (A) divided by the root of the number (B)
00:07 It is the same as the root of the fraction (A divided by B)
00:12 Apply this formula to our exercise and convert to the root of the fraction
00:16 Square it to eliminate the root
00:26 The square cancels the root, calculate 3 squared
00:29 Isolate X
00:43 This is the solution

Step-by-Step Solution

To solve this problem, we'll apply the properties of square roots and some straightforward algebraic techniques:

Step 1: Recall the equation given is:

90x=3 \frac{\sqrt{90}}{\sqrt{x}} = 3

Use the property of the square root quotient:

90x=3 \sqrt{\frac{90}{x}} = 3

Step 2: To eliminate the square root, square both sides of the equation:

(90x)2=32 \left(\sqrt{\frac{90}{x}}\right)^2 = 3^2

Thus, we have:

90x=9 \frac{90}{x} = 9

Step 3: Solve for xx by performing algebraic manipulation:

Multiply both sides by xx to remove the fraction:

90=9x 90 = 9x

Divide both sides by 9 to isolate xx:

x=909 x = \frac{90}{9}

Simplifying, we find:

x=10 x = 10

Therefore, the solution to the equation is x=10 x = 10 .

Answer

10