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If 3a=4b=12-c then ab+bc+ca=

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If 3a=4b=12-c then ab+bc+ca=

    • Posted by Deepak Parashar 5 years, 11 months ago

    CBSE > Class 12 > Mathematics
    • 1 answers

    Hemank Mittal 5 years, 11 months ago

    ab+bc+ca = a(3a/4)+(3a/4)(12-a) +(12-a) (a) = (3a^2/4)+9a-(3a^2/4)+12a-a^2 = 21a-a^2

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