LEARN · EXPLAIN · REVISE

Find the positive root.

Read the idea, work independently, then explain what changed.

TOPIC 01

Quadratic equations and functions

The full solution set is {−4,4}; the word positive restricts the requested answer.

PREDICT → MOVE → EXPLAIN

Before moving a slider, predict the opening, vertex and intercepts. Then compare the graph with your prediction.

Use one hint at a time. A correction explains what changed, not just the final answer.

01 / Foundation#Your turn

x^2=16

Working and explanation

BUILD THE REASONING

Hint 1

Both square roots solve the equation.

Hint 2

The question asks for the positive one.

Worked solution

The positive root is 4.

Checks and common pitfalls: The full solution set is {−4,4}; the word positive restricts the requested answer.

Think first. Reveal a hint when the class is ready.