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    Simplifying Expressions

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    10. (-x - 5)(-x + 5) <----- Simplify

    14. [3x2(2x - 3) + 27x3(2x - 3)] / [3x(3 - 2x)] <--------- Simplify

    17. (3x2 + 7)(9 - 8x) = 3x2 - 56x + 63 <-------- Describe the mistakes if any

    19. See picture <---------- describe the mistakes if any.

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    Expressions are simplified and discussed in the solution.

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