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2-0.3x(15-3x)=9
We move all terms to the left:
2-0.3x(15-3x)-(9)=0
We add all the numbers together, and all the variables
-0.3x(-3x+15)+2-9=0
We add all the numbers together, and all the variables
-0.3x(-3x+15)-7=0
We multiply parentheses
-0x^2-0x-7=0
We add all the numbers together, and all the variables
-1x^2-1x-7=0
a = -1; b = -1; c = -7;
Δ = b2-4ac
Δ = -12-4·(-1)·(-7)
Δ = -27
Delta is less than zero, so there is no solution for the equation
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