Graph the quadratic and read the intercepts and the vertex off the curve instead of completing the square under a timer. The algebra is still worth knowing. This is only the digital shortcut. Desmos access is in Desmos on the ACT.
What to click
Type y = ax² + bx + c. The x-intercepts are the roots. The y-intercept is c, and you can confirm it where the curve hits the y-axis. Click the turning point for the vertex. Desmos labels that point. If the question asks for the axis of symmetry, it is the x-coordinate of the vertex.
Solving by factoring or the quadratic formula is in quadratic equations. Use the graph when the numbers are ugly or the question asks for a vertex you do not want to compute.
Systems that include a parabola
A line and a parabola can meet twice. Click each intersection. That setup is the same move as systems in Desmos. If the graph is off the screen, zoom out. That fix is in zooming in Desmos.
The bottom line
Graph it, then read roots and vertex from the labeled points. Do not retype the algebra if the graph already answered the question.
Start practicing
Start with a free diagnostic, then drill your weak spots with 15-question quizzes and track how you're doing across Reading, English, and Math. Compare plans whenever you're ready to go further.
This article offers general ACT prep guidance. The ACT can change from year to year, including its format, scoring, policies, test dates, and fees, so always confirm the latest details on the official ACT website at act.org before you make decisions. ACT® is a registered trademark of ACT, Inc. thirty-six is not affiliated with, endorsed by, or sponsored by ACT.