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5(y^2+7)=20
We move all terms to the left:
5(y^2+7)-(20)=0
We multiply parentheses
5y^2+35-20=0
We add all the numbers together, and all the variables
5y^2+15=0
a = 5; b = 0; c = +15;
Δ = b2-4ac
Δ = 02-4·5·15
Δ = -300
Delta is less than zero, so there is no solution for the equation
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