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14 September, 17:45

Solve using the quadratic formula: 2x^2+10x+15=0

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  1. 14 September, 20:27
    0
    -1.382 & - 3.618

    Step-by-step explanation:

    -b+-sqrtb^2-4ac/2a

    a=2

    b=10

    c=15

    -10+-sqrt10^2-4 (2) (15) = - 10+-sqrt20

    = - 10 + - 4.472

    = - 10 + 4.472 = -5.528/4 = -1.382

    -10 - 4.472 = -14.472/4 = - 3.618
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