If you're seeing this message, it means we're having trouble loading external resources on our website.

If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.

Main content

Quadratics by taking square roots: strategy

Problem

Pam solved a quadratic equation. Her work is shown below.
In which step did Pam make an error?
(x+2)2=16x+2=4Step 1x=2Step 2\begin{aligned} (x+2)^2&=16 \\\\ x+2&=4&\text{Step }1 \\\\ x&=2&\text{Step }2 \end{aligned}
Choose 1 answer:
Choose 1 answer:
Stuck?
Stuck?