SOLUTION: When the parabola: {{{y = x^2-a(x+1)+3}}} intersects the x-axis at one point, then a must equal ___ or ___. What I've got so far, (not a lot unfortunately): {{{y = 0}}} {

SOLUTION: When the parabola: {{{y = x^2-a(x+1)+3}}} intersects the x-axis at one point, then a must equal _ or _. What I've got so far, (not a lot unfortunately): {{{y = 0}}} {

Question 146209: When the parabola: intersects the x-axis at one point, then a must equal ___ or ___.
What I've got so far, (not a lot unfortunately):

and here I become unstuck. No use of graphics calculator permitted. Much thanks for any help!

Answer by oscargut(2103) (Show Source): You can put this solution on YOUR website!
the parabola: intersects the x-axis at one point,so
(-a)^2-4(1)(3)=0 so a^2-12=0 so or

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