Math Problem Statement

(6√3 - 4) / (8 - √3) in the form p√3 - q

Solution

We are tasked with simplifying the expression 63483\frac{6\sqrt{3} - 4}{8 - \sqrt{3}} into the form p3qp\sqrt{3} - q.

Step-by-Step Solution:

  1. Rationalizing the denominator: To simplify this expression, we will multiply both the numerator and the denominator by the conjugate of the denominator, which is 8+38 + \sqrt{3}. This will eliminate the square root from the denominator.

    The expression becomes:

    (634)(8+3)(83)(8+3)\frac{(6\sqrt{3} - 4)(8 + \sqrt{3})}{(8 - \sqrt{3})(8 + \sqrt{3})}

  2. Simplifying the denominator: The denominator is now a difference of squares, which simplifies as:

    (83)(8+3)=82(3)2=643=61(8 - \sqrt{3})(8 + \sqrt{3}) = 8^2 - (\sqrt{3})^2 = 64 - 3 = 61

    So the denominator simplifies to 61.

  3. Expanding the numerator: Now we expand the numerator:

    (634)(8+3)=63(8+3)4(8+3)(6\sqrt{3} - 4)(8 + \sqrt{3}) = 6\sqrt{3}(8 + \sqrt{3}) - 4(8 + \sqrt{3}) Expanding both terms:

    =638+6334843= 6\sqrt{3} \cdot 8 + 6\sqrt{3} \cdot \sqrt{3} - 4 \cdot 8 - 4 \cdot \sqrt{3} =483+633243= 48\sqrt{3} + 6 \cdot 3 - 32 - 4\sqrt{3} =483+183243= 48\sqrt{3} + 18 - 32 - 4\sqrt{3} Simplify further: =(48343)+(1832)= (48\sqrt{3} - 4\sqrt{3}) + (18 - 32) =44314= 44\sqrt{3} - 14

  4. Putting it all together: The expression now becomes:

    4431461\frac{44\sqrt{3} - 14}{61}

    We can rewrite this as:

    446131461\frac{44}{61}\sqrt{3} - \frac{14}{61}

So, the simplified form is:

p3q=446131461p\sqrt{3} - q = \frac{44}{61}\sqrt{3} - \frac{14}{61}

Final Answer:

p=4461,q=1461p = \frac{44}{61}, \quad q = \frac{14}{61}

Would you like more details on any step or have any questions?

Here are 5 related questions:

  1. How do you rationalize a denominator with square roots?
  2. Why does multiplying by the conjugate remove the square root?
  3. Can this technique be used for higher-degree roots?
  4. What is the significance of the difference of squares formula?
  5. How does the distributive property work with surds?

Tip: When dealing with roots in denominators, always look for opportunities to use the conjugate for rationalization.

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Math Problem Analysis

Mathematical Concepts

Algebra
Rationalization
Surds
Difference of Squares

Formulas

Conjugate: (a - b)(a + b) = a^2 - b^2
Rationalization
Distributive Property

Theorems

Difference of Squares Theorem

Suitable Grade Level

Grades 10-12