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algebra 2

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Nonlinear homework...
Solve the system by elimination.
1)y=x^2+2
-4x-y=10

2) Solve the system using substitution.
Y=-3x^2+x-2
Y=-5x+3

  • algebra 2 -

    1)
    add them the way they sit

    -4x = x^2 + 12
    x^2 + 4x + 12 = 0
    I would complete the square:
    x^2 + 4x + 4 = -12 + 4
    (x+2)^2 = -8
    x+2 = ± √-8 = ± 2√2 i
    x = -2 ± 2√2 i

    for 2)
    you would get
    -5x+3 = -3x^2 + x - 2
    3x^2 - 6x + 5 = 0

    give it a shot...... (use the formula)

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