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2.4=4x^2+6.4
We move all terms to the left:
2.4-(4x^2+6.4)=0
We get rid of parentheses
-4x^2-6.4+2.4=0
We add all the numbers together, and all the variables
-4x^2-4=0
a = -4; b = 0; c = -4;
Δ = b2-4ac
Δ = 02-4·(-4)·(-4)
Δ = -64
Delta is less than zero, so there is no solution for the equation
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