Algebra
Calculus
Trigonometry
Matrix
Question
Factor the expression
(3−x)(3+x)
Evaluate
9−x2
Rewrite the expression in exponential form
32−x2
Solution
(3−x)(3+x)
Show Solution
Find the roots
x1=−3,x2=3
Evaluate
9−x2
To find the roots of the expression,set the expression equal to 0
9−x2=0
Move the constant to the right-hand side and change its sign
−x2=0−9
Removing 0 doesn't change the value,so remove it from the expression
−x2=−9
Change the signs on both sides of the equation
x2=9
Take the root of both sides of the equation and remember to use both positive and negative roots
x=±9
Simplify the expression
More Steps
Evaluate
9
Write the number in exponential form with the base of 3
32
Reduce the index of the radical and exponent with 2
3
x=±3
Separate the equation into 2 possible cases
x=3x=−3
Solution
x1=−3,x2=3
Show Solution