Math Problem Statement

2√5 per 3-√2

Solution

You provided the expression: 2532\frac{2\sqrt{5}}{3 - \sqrt{2}}. To simplify this, we can rationalize the denominator by multiplying both the numerator and denominator by the conjugate of 323 - \sqrt{2}, which is 3+23 + \sqrt{2}.

Steps to simplify:

2532×3+23+2=25(3+2)(32)(3+2)\frac{2\sqrt{5}}{3 - \sqrt{2}} \times \frac{3 + \sqrt{2}}{3 + \sqrt{2}} = \frac{2\sqrt{5}(3 + \sqrt{2})}{(3 - \sqrt{2})(3 + \sqrt{2})}

  1. Simplify the denominator: (32)(3+2)=32(2)2=92=7(3 - \sqrt{2})(3 + \sqrt{2}) = 3^2 - (\sqrt{2})^2 = 9 - 2 = 7

  2. Expand the numerator: 25(3+2)=25×3+25×2=65+2102\sqrt{5}(3 + \sqrt{2}) = 2\sqrt{5} \times 3 + 2\sqrt{5} \times \sqrt{2} = 6\sqrt{5} + 2\sqrt{10}

So, the expression becomes:

65+2107\frac{6\sqrt{5} + 2\sqrt{10}}{7}

This is the simplified form of the given expression.

Final Answer:

65+2107\frac{6\sqrt{5} + 2\sqrt{10}}{7}

Would you like further details on any part of the simplification?

Here are 5 questions that expand on this:

  1. How do you rationalize a denominator?
  2. What is the purpose of using the conjugate in simplification?
  3. Can you always simplify a square root expression like 10\sqrt{10}?
  4. How do you expand binomials involving square roots?
  5. What happens when you square a square root?

Tip: When rationalizing denominators, always multiply by the conjugate of the denominator for efficient simplification.

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Math Problem Analysis

Mathematical Concepts

Rationalization
Algebra
Square Roots

Formulas

Conjugate formula: (a - b)(a + b) = a^2 - b^2
Multiplying radicals: √a * √b = √(a*b)

Theorems

Rationalizing Denominators
Conjugate Theorem

Suitable Grade Level

Grades 8-10