(2x+5)2-x(4x-5)=100

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Solution for (2x+5)2-x(4x-5)=100 equation: 



(2x+5)2-x(4x-5)=100

We move all terms to the left:

(2x+5)2-x(4x-5)-(100)=0

We multiply parentheses

-4x^2+4x+5x+10-100=0

We add all the numbers together, and all the variables

-4x^2+9x-90=0

a = -4; b = 9; c = -90;
Δ = b2-4ac
Δ = 92-4·(-4)·(-90)
Δ = -1359
Delta is less than zero, so there is no solution for the equation

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