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-9m^2-7=-3m^2
We move all terms to the left:
-9m^2-7-(-3m^2)=0
We get rid of parentheses
-9m^2+3m^2-7=0
We add all the numbers together, and all the variables
-6m^2-7=0
a = -6; b = 0; c = -7;
Δ = b2-4ac
Δ = 02-4·(-6)·(-7)
Δ = -168
Delta is less than zero, so there is no solution for the equation
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