Y=-2x^2+8x-25

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Solution for Y=-2x^2+8x-25 equation: 



=-2Y^2+8Y-25

We move all terms to the left:

-(-2Y^2+8Y-25)=0

We get rid of parentheses

2Y^2-8Y+25=0

a = 2; b = -8; c = +25;
Δ = b2-4ac
Δ = -82-4·2·25
Δ = -136
Delta is less than zero, so there is no solution for the equation

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