4u^2+7=-3

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Solution for 4u^2+7=-3 equation: 



4u^2+7=-3

We move all terms to the left:

4u^2+7-(-3)=0

We add all the numbers together, and all the variables

4u^2+10=0

a = 4; b = 0; c = +10;
Δ = b2-4ac
Δ = 02-4·4·10
Δ = -160
Delta is less than zero, so there is no solution for the equation

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