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anonymous
 one year ago
y=(x+2)(x4)
find the domian,range,axis of symmetry
anonymous
 one year ago
y=(x+2)(x4) find the domian,range,axis of symmetry

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misty1212
 one year ago
Best ResponseYou've already chosen the best response.1first step would be to multiply this out

misty1212
 one year ago
Best ResponseYou've already chosen the best response.1let mt know what you get

misty1212
 one year ago
Best ResponseYou've already chosen the best response.1then we can finish quickly

misty1212
 one year ago
Best ResponseYou've already chosen the best response.1now the fact that the leading coefficient it negative ( it is \(1\)) means this parabola opens down all that is left is to find the vertex

misty1212
 one year ago
Best ResponseYou've already chosen the best response.1the first coordinate of the vertex of \(y=ax^2+bx+c\) is \[\frac{b}{2a}\] which in your case is \[\frac{2}{2\times (1)}\]

misty1212
 one year ago
Best ResponseYou've already chosen the best response.1right and the second coordinate is what you get for \(y\) when you replace \(x\) by \(1\)

misty1212
 one year ago
Best ResponseYou've already chosen the best response.1so lets answer each question in order

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0d=all real #'s right?

misty1212
 one year ago
Best ResponseYou've already chosen the best response.1Find the domian the domain of an polynomial is \(\mathbb{R}\) what you said

misty1212
 one year ago
Best ResponseYou've already chosen the best response.1the range since it is a parabola that opens down, and has a maximum at \(y=9\) the range is?

misty1212
 one year ago
Best ResponseYou've already chosen the best response.1not sure where you got the \(9\) from it is \(9\) right?

misty1212
 one year ago
Best ResponseYou've already chosen the best response.1and also the parabola opens down that means the MAXIMUM value is 9, not the minimum value

misty1212
 one year ago
Best ResponseYou've already chosen the best response.1dw:1439235731008:dw

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0is maximum <=,>= or <,>

misty1212
 one year ago
Best ResponseYou've already chosen the best response.1lets forget about rules and think the possible values for \(y\) are numbers less than or equal to 9

misty1212
 one year ago
Best ResponseYou've already chosen the best response.1if you want to write it as an inequality you can write \[y\leq 9\] or as an interval \[(\infty, 9]\]

misty1212
 one year ago
Best ResponseYou've already chosen the best response.1and finally, the axis of symmetry which we found ages ago is \(x=1\)

misty1212
 one year ago
Best ResponseYou've already chosen the best response.1\[\color\magenta\heartsuit\]
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