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4 January, 14:20

Use the quadratic formula to find the solutions to the quadratic equation below 2x^2-5x+5=0

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  1. 4 January, 18:01
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    x = (5 + i sqrt (15)) / 4 or x = (5 - i sqrt (15)) / 4

    Step-by-step explanation:

    Solve for x:

    2 x^2 - 5 x + 5 = 0

    Hint: | Using the quadratic formula, solve for x.

    x = (5 ± sqrt ((-5) ^2 - 4*2*5)) / (2*2) = (5 ± sqrt (25 - 40)) / 4 = (5 ± sqrt (-15)) / 4:

    x = (5 + sqrt (-15)) / 4 or x = (5 - sqrt (-15)) / 4

    Hint: | Express sqrt (-15) in terms of i.

    sqrt (-15) = sqrt (-1) sqrt (15) = i sqrt (15):

    Answer: x = (5 + i sqrt (15)) / 4 or x = (5 - i sqrt (15)) / 4
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