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Expand following suitable identity (-2x+5y-3z)

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Expand following suitable identity (-2x+5y-3z)

    • Posted by Nur Narjina Ahmed 4 years, 2 months ago

    CBSE > Class 09 > Mathematics
    • 2 answers

    Khwairakpam Zenith Chanu 4 years, 2 months ago

    (-2x+5y-3z) = (2x) ² + (5y) ² + (3z) ² - 2 . 2x. 5y - 2 . 5y .3z + 2 . 3z . 2x ("." means multiply) = 4x²+ 25y² + 9z² - 20xy - 30yz + 12zx Formula: x²+y²+z²-2xy-2yz+2zx

    2Thank You

    Aarushi Erande 4 years, 2 months ago

    Use the formula a²+b²+c²+2ab+2bc+2ca. Plz mind the negative signs.

    1Thank You

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