Kalij13 Kalij13
  • 01-03-2019
  • Mathematics
contestada

To factor 9x^2-4 you can first rewrite the expression as

Respuesta :

ikarus ikarus
  • 11-06-2019

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]

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