Question

How to graph y=2x^2-2x-1 without a calculator

Answer 1

set up a table
plot the points
trace the curve

Answer 2

or you can do the sketch
find the intercepts
when x =0 what is y and when y = 0 what is x

Answer 3

exactly, as you know that it is in the form of a parabola.

Answer 4

when you have a 2nd degree function the graph is that of a parabola

Answer 5

ax^2 + bx + c when a is positive opens up and when a is negative opens down

complete the square to find the vertex and axis of symmetry

Answer 6

The problem is that when I solve for x when y=0 I get a complex number (i). I used the quadratic formula.