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22 October, 21:50

The roots of y in the equation of y2-2y=-9/2 are

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  1. 22 October, 22:20
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    Hello:

    y²-2y=-9/2

    (y²-2y + 1) - 1 = - 9/2

    (y-1) ² = - 7/2

    in : R no solutions

    in : C two solutions

    y-1 = - (√ 7/2) i or y-1 = (√ 7/2) i

    y = 1 - (√7/2) i or y = 1 + (√ 7/2) i because : - 7/2 = (7/2) i² ... i² = - 1
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