Question

What are the x– and y–intercepts of the quadratic equation y = (x – 1)2 – 16? Identify the x–intercepts by graphing the quadratic equation.

Answer 1

*y=(x-1)^2-16

Answer 2

The x-intercepts are where the parabola crosses the x-axis. The y intercept is where the parabola crosses the the y-axis.

So just rearrange your equation using the foil method.

\[y=(x-1)(x-1)-16\]\[y=x ^{2}-x-x+1-16\]\[y=x ^{2}-2x-15\]

Enter that into your graphing calculator, or enter the equation on the input line of geogebra.

http://www.geogebra.org/cms/