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Solve the quadratic equation by factoring:

$${ x }^{ 2 }+15x=-54$$

A

$(x+6)(x+9)=0$; The solutions are $6$ and $9$

B

$(x-6)(x-9)=0$, The solutions are $-6$ and $-9$

C

$(x+6)(x-9)=0$; The solutions are $-6$ and $-9$

D

$(x+6)(x+9)=0$; The solutions are $-6$ and $-9$

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