The result of the product property of square root, βa Γ βb = β(aΓb), we have;
1. The side lengths are irrational because 5 and 3 are not perfect squares.
2. The area is equal to β(15). Since 15 is not a perfect square, the square root is irrational.
How can the product property be used to determine if the area is a rational number?
The given side lengths of the rectangle are;
- Length = β5
- Breadth = β3
Rational numbers can be expressed as a ratio, P/Q
Irrational numbers can not be expressed as a fraction
The numbers β5 and β3 are not expressible as fractions, therefore they are irrational numbers.
1. To explain whether the side lengths are rational or irrational
The correct options are therefore;
- The side lengths are irrational because 5 and 3 are not perfect squares
2. Is the value of the area of the rectangle rational or irrational?
Solution;
Area of a rectangle = Length Γ Breadth
Therefore;
The area = β5 Γ β3 = β(15)
β(15) is an irrational number, therefore;
Therefore;
- The area is equal to β(15). Since 15 is not a perfect square, the square root is irrational.
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