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factor the expression completely.18ײ-8

Sagot :

Given the expression:

[tex]18x^2-8[/tex]

notice that both coefficients are even, then they are divisible by 2. Factoring the 2 we get:

[tex]18x^2-8=2(9x^2-4)[/tex]

Now, the factor 9x^2-4 is clearly a binomial conjugate, therefore, the final factorization is:

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

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