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-10x(2x-1)+7(3x-5)-8=7-3
We move all terms to the left:
-10x(2x-1)+7(3x-5)-8-(7-3)=0
We add all the numbers together, and all the variables
-10x(2x-1)+7(3x-5)-8-4=0
We add all the numbers together, and all the variables
-10x(2x-1)+7(3x-5)-12=0
We multiply parentheses
-20x^2+10x+21x-35-12=0
We add all the numbers together, and all the variables
-20x^2+31x-47=0
a = -20; b = 31; c = -47;
Δ = b2-4ac
Δ = 312-4·(-20)·(-47)
Δ = -2799
Delta is less than zero, so there is no solution for the equation
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