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(0.7a^2-1.8a+1.4)-(5.6a^2-1.2a+3.7)=
We move all terms to the left:
(0.7a^2-1.8a+1.4)-(5.6a^2-1.2a+3.7)-()=0
We add all the numbers together, and all the variables
(0.7a^2-1.8a+1.4)-(5.6a^2-1.2a+3.7)=0
We get rid of parentheses
0.7a^2-5.6a^2-1.8a+1.2a+1.4-3.7=0
We add all the numbers together, and all the variables
-4.9a^2-0.6a-2.3=0
a = -4.9; b = -0.6; c = -2.3;
Δ = b2-4ac
Δ = -0.62-4·(-4.9)·(-2.3)
Δ = -44.72
Delta is less than zero, so there is no solution for the equation
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