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x=-11 OR x=10

So, x2+x=110, or x2+x-110=0. Use the quadratic formula to solve for x

x=((-1)+/-sqrt((-1)2-4*(1)(-110)))/(2(1))

x=((-1)+/-sqrt(441))/(2)

x=((-1)+/-21)/(2)

x=-22/2 OR x=20/2

x=-11 OR x=10

Alternatively, you can recognize that x2+x-110=0 can be factored into (x+11)(x-10)=0, which yields the same result.

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Q: What is x if X squared plus x equals 110?
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