X2+2x+90=x2

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Solution for X2+2x+90=x2 equation: 



X2+2X+90=X2

We move all terms to the left:

X2+2X+90-(X2)=0

We add all the numbers together, and all the variables

2X+90=0

We move all terms containing X to the left, all other terms to the right

2X=-90

X=-90/2

X=-45

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