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how do you make y=x^2+7x-8 into graphing form

 Sep 22, 2015
 #1
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y=x^2+7x-8     this is a parabola that turns upward

 

The x coordinate of the vertex is = -7/2(1)  = -7/2 = -3.5

 

The y coordinate of the vertex is  (-3.5)^2 + 7(-3.5) - 8  = -81/4 = -20.25

 

Factoring to find the roots, we have...  (x -1) (x + 8)  = 0   setting each factor to 0  rhe roots are  x= 1 and x = -8

 

Here's the graph..........https://www.desmos.com/calculator/jibcea03br

 

 

cool cool cool

 Sep 22, 2015

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