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21 June, 10:41

Use the quadratic formula to solve for x.

3x² + 9x=-4

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  1. 21 June, 10:52
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    Step-by-step explanation:

    3x² + 9x=-4 means : 3x² + 9x+4=0

    a=3 and b=9 and c = 4

    Δ : b²-4ac Δ = 9²-4 (3) (4) = 81 - 48 = 33

    Solution of a quadratic equation ax² + bx + c = 0

    x = [-b ± v (b² - 4ac) ]/2a

    Δ = b² - 4ac ... continu
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