Solve the quadratic equation 27y^2-314y+699​

Question

Solve the quadratic equation 27y^2-314y+699​

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Mộc Miên 1 year 2021-09-04T17:51:50+00:00 1 Answers 9 views 0

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    2021-09-04T17:52:59+00:00

    Answer:

    [tex]3; \frac{233}{27}[/tex].

    Step-by-step explanation:

    1) to calculate the discriminant of the given equation:

    D=(314/2)²-699*27=5776.

    2) to calculate the roots of the given equation:

    [tex]\left[\begin{array}{ccc}y=\frac{157-\sqrt{5776} }{27} \\ y=\frac{157+\sqrt{5776} }{27} \end{array}[/tex]

    [tex]<=> \ \left[\begin{array}{ccc}y=3\\y=\frac{233}{27} \end{array}[/tex]

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )