Add: 2x(z – x – y) and 2y(z – y – x) from Mathematics A
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    Algebraic Expressions and Identities

    Multiple Choice QuestionsShort Answer Type

    51.

    Fint  the product.

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    52.

    Fint  the product.
     
    "<pre


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    53.

    Find the product.

    X x X2 x X3 x X4

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    54.

    Simplify 3x(4x - 5) + 3 and find its values for (i) x = 3 (ii) space space space space space space space space straight x space equals space 1 half

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    55.

    simplify a(a2 + a + 1) + 5 and find its values for (i) a = 0, (ii) a = 0, and (iii) a = -1.

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    56.

    (a) Add: p(p – q), q(q – r) and r(r – p)

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    57.

    Add: 2x(z – x – y) and 2y(z – y – x)

    ∵     2x(z - x - y) = 2x X z - 2x X x -2x X y = 2xz - 2x2 - 2xy

    and   2y( z - y - x) = 2y  x Z - 2y x X = 2yz - 2y2 x 2yx

    ∴  Adding the above products, we have

     2xz  - 2x2 - 2xy
                    - 2xy  + 2yz  -2y2
    _______________________________
      2xz  - 2x2 - 4xy + 2yz  - 2y2

    = - 2x2 - 4xy + 2yz  - 2yz

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    58.

     Subtract: 3l(l – 4m + 5n) from 41(10n + 3m + 2l)

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    59.

    Subtract: 3a(a + b + c) – 2b(a – b + c) from 4c(–a + b + c)

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    60.

     Multiply:
    (–3x) and (–5y + 2) (ii) 5xy and (y2 + 3)

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