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Simplify. Rationalize the denominator. \newline73+2\frac{7}{-3 + \sqrt{2}}

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Q. Simplify. Rationalize the denominator. \newline73+2\frac{7}{-3 + \sqrt{2}}
  1. Identify Conjugate of Denominator: Identify the conjugate of the denominator 3+2-3 + \sqrt{2}.\newlineThe conjugate of a number of the form a+ba + \sqrt{b} is aba - \sqrt{b}. Therefore, the conjugate of 3+2-3 + \sqrt{2} is 32-3 - \sqrt{2}.
  2. Multiply by Conjugate: Multiply the numerator and the denominator by the conjugate of the denominator.\newlineTo rationalize the denominator, we multiply the fraction by a form of 11 that will eliminate the square root in the denominator. This form of 11 is the conjugate of the denominator over itself.\newlineSo, we multiply 73+2\frac{7}{-3 + \sqrt{2}} by 3232\frac{-3 - \sqrt{2}}{-3 - \sqrt{2}}.
  3. Apply Distributive Property: Apply the distributive property to the numerator.\newlineMultiply 77 by each term in the conjugate 32-3 - \sqrt{2}.\newline7×(3)=217 \times (-3) = -21\newline7×(2)=727 \times (-\sqrt{2}) = -7\sqrt{2}\newlineSo, the numerator becomes 2172-21 - 7\sqrt{2}.
  4. Apply Difference of Squares: Apply the difference of squares formula to the denominator.\newlineThe product of a binomial and its conjugate is the difference of squares:\newline(3+2)(32)=(3)2(2)2(-3 + \sqrt{2}) * (-3 - \sqrt{2}) = (-3)^2 - (\sqrt{2})^2\newline92=79 - 2 = 7\newlineSo, the denominator becomes 77.
  5. Combine Numerator and Denominator: Combine the simplified numerator and denominator. The fraction is now (2172)/7(-21 - 7\sqrt{2})/7.
  6. Simplify Fraction: Simplify the fraction by dividing each term in the numerator by the denominator.\newline217=3-\frac{21}{7} = -3\newline727=2-\frac{7\sqrt{2}}{7} = -\sqrt{2}\newlineSo, the simplified expression is 32-3 - \sqrt{2}.

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