Type a math problem or upload a photo, screenshot, handwritten question...
error msg
- Algebra
- Calculus
- Trigonometry
- Matrix
- Differential
- Integral
- Trigonometry
- Letters
Question
\left(x+3\right)\left(x-3\right)
Simplify the expression
x^{2}-9
Evaluate
\left(x+3\right)\left(x-3\right)
\text{Use }(a+b)(a-b)=a^2-b^2\text{ to simplify the product}
x^{2}-3^{2}
Solution
x^{2}-9
Show Solutions
Find the roots
x_{1}=-3,x_{2}=3
Evaluate
\left(x+3\right)\left(x-3\right)
To find the roots of the expression,set the expression equal to 0
\left(x+3\right)\left(x-3\right)=0
\text{Separate the equation into }2\text{ possible cases}
\begin{align}&x+3=0\\&x-3=0\end{align}
Solve the equation
More Steps
Evaluate
x+3=0
Move the constant to the right-hand side and change its sign
x=0-3
Removing 0 doesn't change the value,so remove it from the expression
x=-3
\begin{align}&x=-3\\&x-3=0\end{align}
Solve the equation
More Steps
Evaluate
x-3=0
Move the constant to the right-hand side and change its sign
x=0+3
Removing 0 doesn't change the value,so remove it from the expression
x=3
\begin{align}&x=-3\\&x=3\end{align}
Solution
x_{1}=-3,x_{2}=3
Show Solutions
