Question

What is the factored form of this equation? x^2-121

Answer 1

Answer:(x+11)(x-11)

Step-by-step explanation:

Answer 2

Answer:

(x + 11)(x - 11)

Step-by-step explanation:

Since $x^{2}$ and 121 are both perfect squares ($\sqrt{x^{2}$ = $x$ and $\sqrt{121}$ = $11$), we can write the difference of two perfect squares a and b in the factored form: $(\sqrt{a} +\sqrt{b} ) (\sqrt{a} - \sqrt{b} )$. Therefore, the factored form of x^2 - 121 is (x +11)(x - 11).

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