Question

Which of the quadratics has a graph with only one x-intercept? A) y = 2x2 + 4 B) y = x2 - 8x + 16 C) y = 2x2 - 8x + 20 D) y = -2(x -1)2 + 2

Answer 1

I think its D but I'm assuming that the 2 to the right of the bracket was mistake. every quadratic equation (x^2) has two roots (2 x intercepts) so find the equation without an x^2

Answer 2

There is a math app called desmos past the graph equations and it will show you the answer. But i will comment below and tell you the answer if you don't want to