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29 March, 16:18

Why is it useful to know the definition of rational expression? explain through an example of your own?

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  1. 29 March, 19:31
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    It is important to know rational expression because we come across rational expressions most of the time in the real world, often without even realizing it.

    Example: you may want to know how much of a 25% chemical solution need to be added to 1L of water to produce a 10% solution.

    Ans: Equation:

    solution + water = solution

    0.25x + 0*1 L = 0.10 (x+1)

    Multiply the above equation by 100 to get:

    25x + 0 = 10x + 10

    15x = 10

    x = 2/3 Liter (amt. of 25% solution in the mixture)
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