algebra
posted by Marissa .
1)Identify the yintercept and the axis of symemetry for the graph of f(x)=3x^2+6x+12.
answer=12:x=1
2)Determine whether f(x)=5x^210x+6 has a maximum or minimum value and find that value.
answer=maximum 1
3)Solve x^2=4x by graphing and indicate the roots.
answer=0,4
4)Solve x^2+2x=2 by graphing and indicate the roots.
answer=1,1
5)Solve by factoring:x^23x=28
answer=4,7
#1, I got x=1
#2, no
the function opens up, so there is a minimum.
it occurs when x=1, and that minimum is f(1), which is 11
#3, ok
#4 graphing f(x) = x^2 + 2x + 2
produces a parabola which lies above the xaxis, so there is no real solution.
#5 ok
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