Simplify:(2.5p - 1.5q)2 - (1.5p - 2.5q)2 from Mathematics Algeb
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    Algebraic Expressions and Identities

    Multiple Choice QuestionsShort Answer Type

    111.

    Find the following squares by using the identities.

    (xy + 3z)2

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    Answer
    112.

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    (6x2 - 5y)2

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    113.

    Find the following squares by using the identities.


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    Find the following squares by using the identities.

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    Answer
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    115.

    Find the following squares by using the identities.

    (2xy + 5y)2

    84 Views
    Answer
    116.

    Simplify:

    (a2 - b2)2

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    Answer
    117.

    Simplify:

    (2x + 5)2 - (2x - 5)2

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    Answer
    118.

    Simplify:

    (7m - 8n)2 - (7m + 8n)2

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    Answer
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    119.

    Simplify:

    (4m + 5n)2 + (5m + 4n)2

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    Answer
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    120.

    Simplify:

    (2.5p - 1.5q)2 - (1.5p - 2.5q)2

    (2.5p - 1.5q)2 - (1.5p - 2.5q)2

    = [(2.5p)2 - 2(2.5)(1.5)2p + (1.5q)2 ] - [(1.5p)2 - 2(1.5p)(1.5q)2p + (2.5q)2 ]
    = 6.25p2 - 7.5pq + 2.25q2  - [2.25q2 -7.5pq + 6.25q2]
    = 6.25p2 - 7.5pq + 2.25q2  - 2.25q2 +7.5pq - 6.25q2 
    = (6.25 - 2.25)p2 + (-7.5 7.5)pq + (2.25 - 6.25)q2
    = 4p2 + 0(pq) - 4q
    = 4p2 - 4q2  

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