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If -4 is a root of …

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If -4 is a root of the equation x2+px-4=0and the equation x2+px+q=0 has equal roots .Find the values of p and q.

    • Posted by Mausam Chahal 6 years, 10 months ago

    CBSE > Class 10 > Mathematics
    • 2 answers

    Mausam Chahal 6 years, 10 months ago

    I don't understand

    0Thank You

    Mr.Raj Sharma 6 years, 10 months ago

    x²+px-4=0 putting the value x=-4 (-4)²+p(-4)-4=0 16(2)-4p-4=0 32-4p-4=0 28-4p=0 28=4p p=28/4 p=7 now.x²+px+q has equal roots so (b)²-4ac=0 (p) ²-4(1)(q)=0 (7)²-4q=0 49-4q=0 49=4q q=49/4 THAT'S THE SOLUTION

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