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  • math -

    They want you to solve for the unknown variable. You need to rewrite the equation in quadratic form
    ax^2 + bx + c = 0, first of all.

    y^2 -6x = -7 can be rewritten
    y^2 -6x +7 = 0

    Use the quadratic formula to solve.

    y = [6 +/-sqrt(36-28)]/2
    = 3 +/- sqrt2

    You do the others; someone will check your work if you make the effort.

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