Algebra 2

1.What is the vertex from the equation?
Y=x^2+12x=4

(Please show your work to show me the steps to get to the right answer.)

2. Use the quadratic formula to solve the equation.
x^2-7x-6=0

(Please show your work to show me the steps to get to the right answer. )

3.simplify the expression

(-2/)(8/)

(Please show your work to show me the steps to get to the right answer. )

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  1. Y= x^2+12x=4 ????
    I think maybe
    y = x^2 + 12 x + 4 ????
    x^2 + 12 x = y-4
    x^2 + 12 x + (12/2)^2 = y - 4 + 36
    (x+6)^2 = y+32
    how about (-6,-32)

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  2. x^2-7x-6=0
    a = 1
    b = -7
    c = -6
    x = [ 7 +/- sqrt {49 -(4)(-7)(-6) } ] /2
    = [ 7 +/- sqrt {49 -168 } ] /2
    = [ 7 +/- sqrt {-119 } ] /2
    are you sure that was not +6 = c ?

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  3. -1/4 ????

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