Factor completely. x^4 - 9.

Mathematics

1 answer:

tester [92]4 years ago

7 0

Answer:

$(x^2+3)(x^2-3)$

Step-by-step explanation:

Since both are perfect squares use the difference of squares formula $a^2-b^2=(a+b)(a-b)$ with a = $x^{2}$ and b = 3

= $(x^2 +3)(x^2-3)$

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