Y=-8x^2+3-7

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Solution for Y=-8x^2+3-7 equation: 



=-8Y^2+3-7

We move all terms to the left:

-(-8Y^2+3-7)=0

We get rid of parentheses

8Y^2-3+7=0

We add all the numbers together, and all the variables

8Y^2+4=0

a = 8; b = 0; c = +4;
Δ = b2-4ac
Δ = 02-4·8·4
Δ = -128
Delta is less than zero, so there is no solution for the equation

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