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20 February, 11:29

Solve the system of equations:

y = 2x+1

y = x2 + 2x-8

+3
Answers (1)
  1. 20 February, 12:49
    0
    x = ±3

    Step-by-step explanation:

    Put both equations equal to each other.

    2x + 1 = x^2 - 8

    Cancel 2x on both sides.

    1 = x^2 - 8

    Add 8 to both sides.

    1 + 8 = x^2

    Simplify 1 + 8 to 9.

    9 = x^2

    Take the square root of both sides.

    ±√9 = x

    ±3=x

    Simplify.

    x = ±3
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