Foundation 3: Roots and Radicals
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Questions and Answers

What is the value of $\sqrt{25+16}$?

5

If $x^2 = a$, then $x = \pm \sqrt{a}$. If $x$, then $x =$?

2y

Which operation simplifies radicals correctly?

  • $\sqrt{a} \div \sqrt{b} = \sqrt{\frac{a}{b}}$
  • $\sqrt{a} \times \sqrt{b} = \sqrt{a \times b}$ (correct)
  • $\sqrt{a} + \sqrt{b} = \sqrt{a + b}$
  • $(\sqrt{a})^n = \sqrt{a^n} = a^n$
  • What is the value of $\sqrt{38+84}$?

    <p>2\sqrt{55}</p> Signup and view all the answers

    What is the value of √25 + 16?

    <p>√41</p> Signup and view all the answers

    If 𝑥 = 2𝑦, then 𝑥 = ______?

    <p>4y</p> Signup and view all the answers

    Complete the pattern

    <p>27</p> Signup and view all the answers

    Match the following:

    <p>√101 - 99 = 20 3 = 8</p> Signup and view all the answers

    Study Notes

    Important Roots

    • The symbol √ is used to denote the square root of a number.
    • The symbol √ can be used to simplify expressions involving square roots.

    Basic Rules

    • The rule √a × √b = √(a × b) is used to simplify expressions involving square roots.
    • The rule (√a)^n = √(a^n) is used to simplify expressions involving square roots and exponents.

    Simplifying Radicals

    • Simplifying radicals involves combining like terms and simplifying expressions involving square roots.
    • Examples of simplifying radicals include:
      • √8 = √(4 × 2) = √4 × √2 = 2√2
      • √20 = √(4 × 5) = √4 × √5 = 2√5
      • √9 = √(3 × 3) = √3 × √3 = 3

    Properties of Square Roots

    • If x^2 = a, then x = ±√a
    • Examples of using this property include:
      • If x^2 = 9, then x = ±√9 = ±3
      • If x^2 = 16, then x = ±√16 = ±4

    Comparing Square Roots

    • Comparing square roots involves determining whether one square root is greater than, less than, or equal to another.
    • Examples of comparing square roots include:
      • Comparing √101 and √100: √101 > √100
      • Comparing √0.81 and √0.9: √0.81 < √0.9

    Important Roots

    • The symbol √ is used to denote the square root of a number.
    • The symbol √ can be used to simplify expressions involving square roots.

    Basic Rules

    • The rule √a × √b = √(a × b) is used to simplify expressions involving square roots.
    • The rule (√a)^n = √(a^n) is used to simplify expressions involving square roots and exponents.

    Simplifying Radicals

    • Simplifying radicals involves combining like terms and simplifying expressions involving square roots.
    • Examples of simplifying radicals include:
      • √8 = √(4 × 2) = √4 × √2 = 2√2
      • √20 = √(4 × 5) = √4 × √5 = 2√5
      • √9 = √(3 × 3) = √3 × √3 = 3

    Properties of Square Roots

    • If x^2 = a, then x = ±√a
    • Examples of using this property include:
      • If x^2 = 9, then x = ±√9 = ±3
      • If x^2 = 16, then x = ±√16 = ±4

    Comparing Square Roots

    • Comparing square roots involves determining whether one square root is greater than, less than, or equal to another.
    • Examples of comparing square roots include:
      • Comparing √101 and √100: √101 > √100
      • Comparing √0.81 and √0.9: √0.81 < √0.9

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    Test your understanding of roots and radicals, including basic rules and simplification techniques. Practice solving problems involving square roots and cube roots.

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