(10-x)x=90

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Solution for (10-x)x=90 equation: 



(10-x)x=90

We move all terms to the left:

(10-x)x-(90)=0

We add all the numbers together, and all the variables

(-1x+10)x-90=0

We multiply parentheses

-1x^2+10x-90=0

a = -1; b = 10; c = -90;
Δ = b2-4ac
Δ = 102-4·(-1)·(-90)
Δ = -260
Delta is less than zero, so there is no solution for the equation

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