# 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}}} {

Algebra ->  Algebra  -> Quadratic Equations and Parabolas  -> Quadratic Equation Customizable Word Problems -> 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}}} {      Log On

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 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(891)   (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