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(2x-1)(2x+2)-(x+4)(x-1)+5=0
We multiply parentheses ..
(+4x^2+4x-2x-2)-(x+4)(x-1)+5=0
We get rid of parentheses
4x^2+4x-2x-(x+4)(x-1)-2+5=0
We multiply parentheses ..
4x^2-(+x^2-1x+4x-4)+4x-2x-2+5=0
We add all the numbers together, and all the variables
4x^2-(+x^2-1x+4x-4)+2x+3=0
We get rid of parentheses
4x^2-x^2+1x-4x+2x+4+3=0
We add all the numbers together, and all the variables
3x^2-1x+7=0
a = 3; b = -1; c = +7;
Δ = b2-4ac
Δ = -12-4·3·7
Δ = -83
Delta is less than zero, so there is no solution for the equation
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