Rates and ratios help us find relationships between numbers and proportions.
Answer:
20cm
Step-by-step explanation:
Frame L&W: 25×20
PictureL&W:20×16
25-20=5
Length of Picture frame=5
Length of Picture frame=4
5×4=20cm²
To find area you multiply length by width
The notation in its current form isn't entirely clear.
Did you mean to write
? The 4 isn't in the square root.
If so, then the expression is in simplest form because we cannot simplify
any further (note how 10 doesn't have any perfect square factors other than 1).
Also, the 3/4 portion is fully reduced already.
------------------------
Or,
Did you mean to write
? This time the 4 is inside the square root.
If so, then we can simplify like this

This means that 
<u>Solution-</u>
The equation given here,







But, at x=1,
becomes infinity so it can't be a solution to the equation.
∴ x=1 is the extraneous solution of the equation