Answer:
[tex](3x)^2 - 2^2[/tex]
Step-by-step explanation:
The given expression is [tex]9x^2 - 4[/tex]
We can write [tex]9x^2 = 3*3*x^2 = 3^2.y^2 = (3y)^2[/tex] and 4 can be written as square of 2. 4 = [tex]2^{2}[/tex]
Therefore, we can write [tex]9x^2 - 4 = (3x)^2 - 2^2[/tex]
Now we can factor it out.
We are asked to rewrite the expression.
Therefore, the answer is [tex](3x)^2 - 2^2[/tex]
Let me factor this expression for your reference.
[tex](3x)^2 - 2^2 = (3x -2)(3x +2)[/tex]
