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anonymous
 3 years ago
Can someone help me graph this equation step by step
1.x^26x+8=0
anonymous
 3 years ago
Can someone help me graph this equation step by step 1.x^26x+8=0

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anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0First, do you know what basic shape that function makes?

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0dw:1364839464696:dw

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0Right. So the vertex is the lowest (or highest) point on the graph. You can find the xcoordinate of the vertex using b/2a. Do you know what the a, b, and c terms are?

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0Right, so b/2a is what?

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0the answer would be 3 after doing all the steps

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0Well, it means that the vertex is at x=3. To find the corresponding "y" of the vertex, plug 3 in for "x" in the function there.

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0Okay, so there's your vertex. You know the graph opens up because the quadratic (squared) term is positive. To find where it crosses the xaxis solve the equation for y = 0. It factors nicely: (x +/ ?)(x +/ ?)

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0so if x is positive it goes up if x is negative it goes down

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0No, if x SQUARED is positive it goes up, (x^2)

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0So how does that function factor. Anything multiply to give 8, but add to give 6?

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.04 and 2 both are negative

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0Right, so (x  4)(x  2). Set each equal to 0 and solve. The solutions will be the xvalues where the parabola crosses the xaxis.

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0ok I understand now thanks for all your help

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0Np, you get those and you have your graph.
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