aiyanajmma aiyanajmma

11-09-2020
Mathematics

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how would you factor a quadratic expression like 9x^2-4

how would you factor a quadratic expression like 9x24 class=

Respuesta :

Alfpfeu Alfpfeu

11-09-2020

Hello, we need to see it as a difference of two squares as we know that for all a and b real numbers

[tex]a^2-b^2=(a-b)(a+b)[/tex]

So, here

[tex]9x^2-4=(3x)^2-2^2=(3x-2)(3x+2)[/tex]

Voila !

Thank you

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