Question

question 1
what is a principal square root?
the number 1.
the positive square root of a number.
the largest square root in common.
the positive and negative square roots of a number.

question 2
give the principal square root of 49.

Explanation:

Step1: Define principal square root

By definition, the principal square root of a non-negative number is its non-negative (positive) square root.

Step2: Identify correct option for Q1

Match the definition to the options: "The positive square root of a number" is the correct choice.

Step3: Calculate principal root of 49

Find the positive number $x$ such that $x^2=49$. Since $7^2=49$, the principal square root is 7.

Answer:

1. The positive square root of a number.
2. 7