SOLUTION: When it say find the x intercepts do I graph it or give the variable for the intercept y=x^2-9x+20

Question 62611: When it say find the x intercepts do I graph it or give the variable for the intercept
y=x^2-9x+20

Answer by funmath(2933) (Show Source): You can put this solution on YOUR website!
When it say find the x intercepts do I graph it or give the variable for the intercept
y=x^2-9x+20
Usually, if they don't give you the graph or ask for the graph, they want the coordinate of the x intercepts. We find x-intercepts by letting y=0 and solveing for x.
0=x^2-9x+20 factor
o=(x__)(x__)
fille the blanks with two numbers that multiply to give you +20, but add to give you -9. -4*-5=+20 and -4+(-5)=-9
0=(x-4)(x-5) Let each parentheses=0 and solve for x.
x-4=0 and x-5=0
x-4+4=0+4 and x-5+5=0+5
x=4 and x=5
The x-intercept are (4,0) and (5,0)
Happy Calculating and Happy Thanksgiving!!!

RELATED QUESTIONS
Why is it true that at the x-intercept, the value of y is 0, and at the y-intercept, the... (answered by Earlsdon)

Graph the line and label the X and Y intercepts: 3x-2y=6 I rearranged it into... (answered by Edwin McCravy,ikleyn)

Find the x intercepts.... (answered by THANApHD)

find the x- and y- intercepts for the equation then graph it.... (answered by checkley79)

how do you know when there is an x intercept? for example, it says: For each example,... (answered by ewatrrr)

I am completely lost on how to do these. Any help would be great. It says: Sketch the... (answered by cbcrawford978,ankor@dixie-net.com,solver91311)

I am working with parabolas. For this problem I need to Complete the square Give the... (answered by venugopalramana)

2x+y=-4 x+y=-7 Find the first variable and isolate it. Then solve for that variable.... (answered by Alan3354,Theo,MathTherapy)

y^2=4/5y+4/7= 2 real solutions, one real or two non-real. I say one real because the... (answered by Fombitz)