Answer
$$(x+2)(x-2)=x^2-4$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}(x+2)(x-2)& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}x^2-2x+2x-4 \xlongequal{ } \\[1 em] & \xlongequal{ }x^2 -\cancel{2x}+ \cancel{2x}-4 \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}x^2-4\end{aligned} $$ | |
| ① | Multiply each term of $ \left( \color{blue}{x+2}\right) $ by each term in $ \left( x-2\right) $. $$ \left( \color{blue}{x+2}\right) \cdot \left( x-2\right) = x^2 -\cancel{2x}+ \cancel{2x}-4 $$ |
| ② | Combine like terms: $$ x^2 \, \color{blue}{ -\cancel{2x}} \,+ \, \color{blue}{ \cancel{2x}} \,-4 = x^2-4 $$ |
This page was created using
Simplify polynomials calculator