What is the first step to perform when multiplying or dividing rational expressions to express them in their simplest form? How does

What is the first step to perform when multiplying or dividing rational expressions to express them in their simplest form? How does this step help in reducing the expression to its simplest form?

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  1. [tex]\frac{2(x-1)(2x+9)}{(x-3)(x-2)}[/tex]

    Step-by-step explanation:

    [tex]\frac{4x}{(x-3)}+\frac{6}{(x+2)}[/tex]

    = [tex]\frac{4x(x+2)}{(x-3)(x+2)}+\frac{6(x-3)}{(x+2)(x-3)}[/tex]

    Now we have done the denominators of each term of the expression equal.

    Further we add the terms,

    [tex]\frac{4x(x+2)}{(x-3)(x+2)}+\frac{6(x-3)}{(x+2)(x-3)}[/tex]

    = [tex]\frac{4x(x+2)+6(x-3)}{(x-3)(x+2)}[/tex]

    = [tex]\frac{4x^{2}+8x+6x-18}{(x-3)(x+2)}[/tex]

    = [tex]\frac{4x^{2}+14x-18}{(x-3)(x-2)}[/tex]

    Now factorize the numerator of the fraction.

    4x² + 14x - 18 = 2(2x² + 7x - 9)

                         = 2(2x² + 9x - 2x - 9)

                         = 2[x(2x + 9) - 1(2x + 9)]

                         = 2(x - 1)(2x + 9)

    Therefore, [tex]\frac{2(x-1)(2x+9)}{(x-3)(x-2)}[/tex] will be the answer.

  2. After adding or subtracting two rational expressions, you should put the result in simplest form by reducing it.

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